How about I just list the a's for you? FINE I WILL LIST MORE FOR THE GUY BELOW ME...
Abattoir
Abel
Abin Sur
Able Crown
Abnegazar
Abra Kadabra
Access (Amalgam Comics)
Ace
Ace of Spades
Ace the Bathound
Acidia
Acrata
Acro-Bat
Adam
Admiral Storm
Adonis (Teen Titans animated)
Advance Man
Aegeus
Aerialist
African Woman
Agamemno
Agent Liberty
Agent Orange
Airstryke
Air Wave I-III
Ahwehotah (see Max Mercury)
Akins, Michael (see Michael Akins)
Al Forbush (Amalgam Comics)
Alchemist (see Element Lad)
Alcmaeon
Aleea Strange (Elseworlds)
Alexander Luthor, Jr.
Alexei Luthor (see Lex Luthor)
Alias the Spider
Alien X
Alisand'r
Alistair Bendel White
Allen, Barry (see Flash II)
Allen, Crispus (see Crispus Allen)
Allergent (Agent Orange)
Alley-Kat-Abra
Allure
Alura
Alpha Centurion
Alva Xar
Amanda Waller
Amazing Allegro
Amazing Grace
Amazing Man I-II
Amazo
Ambush Bug
Ambush the Lunatik (Amalgam Comics)
Amen-Hotep
Amethyst, Princess of Gem World
Amok
Amorpho
A-Mortal
Amygdala
Andrew Bennett, I...Vampire
Anarchist
Anarky
Anastasia
Anatol Mykros
André LeBlanc
Andromeda
Angle Man
Animal-Vegetable-Mineral Man
Animal Man
Anima
Animus
Anomaly
Answer
The Ant
Antaeus
Antagon
Anthro
Anti-Matterman
Anti-Monitor
Antithesis
Anton Arcane
Anvil
Apache Chief
Apeface
Appa Ali Apsa
Apparition (see also Phantom Girl)
April Fool (Elseworlds)
Aquagirl I, II, III, & IV
Aqualad (now Tempest)
Aquaman
Darla Aquista
Arak
Arashi
Arch
Archer Braun
Archor
Arclight
Arella
Ares
Argent
Argus
Ariadne
Arion
Arisia
Armek
The Armless Master
Arrakhat
Arrowette
Arsenal (formerly Speedy)
Aruna
Artemis
Ash-Pak-Glif
Asmodel
Asteroth
Astra
Athena II
Atlan
Atlas
Atlas II (Teen Titans animated)
Atmos
The Atom I-IV
Atom Girl
Atom-Master
Atom Smasher (formerly Nuklon)
Atomic Knight
Atomic Skull I & II
Aura
Auron
Aurora
Automan
Avia (Elseworlds)
Awkward Man (of Inferior Five)
Axe (of Metallik, see Teen Titans)
Axeman
Axis
Azazel
Azmodus
Azrael (Jean-Paul Valley, formerly Batman)
Aztar
Aztek
Azerath
Azure
B'dg
B'Shi
B'wana Beast
Babe
Baby Boom
Baby Doll
Backbeat (of Metallik, see Team Titans)
Backlash
Bad Samaritan
Bag O'Bones
Ballistic
Balloon Buster
Bane
The Banner
Baron Bedlam
Baron Blitzkrieg
Baron Tyrano
Baron Winter
Baroness Paula Von Gunther
Barracuda
Barrage
Bart Allen
Batgirl (Cassandra Cain)
Batgirl (Barbara Gordon)
Bat-Girl (Betty Kane)
Bat-Knight (Elseworlds)
Bat Lash
Batman (Dick Grayson)
Batman (Jean Paul Valley)
Batman (Bruce Wayne)
Batman Jones
Bat-Mite
Battalion
Batwoman
Batzarro
Baud
Baytor
Beast Boy (aka Changeling)
Beautiful Dreamer
Bedlam
Beefeater
Beezlebub
Bekka
Belial
Belphegor
Benadict Asp
Beppo
Bernadeth
Bette Noir
Betty Clawman
Bevarlene (Amalgam Comics)
Bibbo Bibbowski
Big Barda
Big Breeda
Big Bear
Big Caesar
Big Shot
Big Sir
Billie the Millie (Amalgam Comics)
Billy Numerous (see also Teen Titans (animated series))
Bird
Bizarro, Bizarro #1 & Bizarro Superman
Black Adam I & II (formerly Teth-Adam)
Black Alice
Black Barax
Black Bison
Black Canary I & II
Black Condor I & II
Black Death
Black Flash
Black Hand
Black Hood (Impact Comics)
Black Lightning
Black Mace
Manchester Black
Black Manta
Black Mask
Black Mass
Black Mongul (Elseworlds)
Black Nebula
Black Orchid
Black Pirate
Black Racer
Black Smith
Black Spider
Black Thorn
Black Vulcan
Black Vulture
Black Zero
Blackbriar Thorn
Blackbriar Tom
Blackfire
Blackguard
Blackhawk
Blackrock I-III
Blacksmith
BlackStar
Blackwing
Blank Slate
Blaze
Blimp (of Inferior Five)
Blindfaith
Blindside
Blip
Blithe
Blizzard
Blockade
Blockbuster I & II
Blok
Bloodlust (Elseworlds)
Bloodsport I & II
Bloodthirst
Bloodwynd
Bloody Mary
Bludhound
Blue Beetle I, II, & III
Blue Devil
Blue Jay
Blue Lama
Blue Snowman
Blue Tracer
Blue Trinity
Bob the Goon
Bob Overdog
Body Doubles
Bolshoi
Bolt
Bombshell
Bonfire
Bongo (of Metallik, see Team Titans)
Bookworm
Booddikka
Booster Gold
Bork
Boss Zucco
Bottler I & II
Bouncing Boy
Bounty
Brand, Boston (see Deadman)
Brain
Brain Storm
Brainiac (also Brainiac 2.5, Brainiac 8, Brainiac 12, Brainiac 13)
Brainiac 2 (see Vril Dox II)
Brainiac 4 (mother of Brainiac 5)
Brainiac 5 (Querl Dox, formerly Brainiac 5.1)
Brains
Brains' Beldon
Brainwave
Brainwave II (Henry "Hank" King, Jr., formerly Brainwave Jr.)
Brahma
Brass (of Metallik, see Team Titans)
Braverman, Kenny
Breach
Breathtaker
Bridgette Crosby
Brik and/or Brick
Brimstone
Bronze Tiger
Brother Blood
Brother Grimm
Brother Manindra
Brrmm
Brutale
Brute
Brutus Force
Buddha (Elseworlds)
Bug
Bugg
Bug-Eyed Bandit
Bulldozer
Bulletgirl
Bulletman
Harvey Bullock
Bumblebee (alias Karen Beecher-Duncan)
Alex Burgess
Roderick Burgess
Bushido
Bushmaster
Buzzard
Byte
Byth
C'est Hay
Cabal
Cachiru
Cain
Cain, Cassandra (see Batgirl)
David Cain
Calamity King
Calculator
Cal Durham (Aquaman)
Veronica Cale
Calendar Girl
Calendar Man
Caliber
Calorie Queen
Cameron Chase
Cannon
Cannonball
Captain Action
Captain Atom
Captain Boomerang I
Captain Boomerang II
Captain Calamity
Captain Carrot
Captain Challenge
Captain Cold
Captain Comet
Captain Compass
4-D (Capt. Lea Corbin)
Captain Destiny
Captain Fear
Captain Hunter
Captain Marvel
Captain Marvel, Jr.
Captain Metropolis (see Watchmen)
Captain Nazi
Captain Speed (Jack B. Quick)
Captain Stingaree
Captain Storm
Captain Thunder
Captain Triumph
Captain Wonder
Captain X
Carapax
Carcharo
Cardinal Sin
Caress
Cave Carson
Carr, Snapper (See Snapper Carr )
Carlton LeHah
Carom
Cascade
Cassidy
Catalyst
Catgirl (Elseworlds)
Cathedral (Elseworlds)
Catherine Cobert
Catman
Catseye
Catspaw
Catwoman
Cavalier
Ceberus
Celeste
Celsius
Centrix
Centurian
Chain Lightning
Chameleon Boy
Chameleon Chief
Changeling (now Beast Boy)
Channel
Chaos Maker
Charlaton
Charma
Charger
Charaxes
Charybdis
Cameron Chase
Chancer
Cheetah I-IV
Chemical King
Chemo
Cheshire
Chief
Chill, Joe (see Joe Chill)
Chiller
Chillblaine
Chimera
Chlorophyll Kid
Choir Boy
Ch'p of the GL Corps
Chronos I & II
Chroma
Chubby Da Choona (Seaguy)
Chunk
Chrysalis
Cicada
Cinderblock (see also Teen Titans (animated series))
Cinnamon
Circe
Citadel
Clayface I-IV
Claything
Clawhammer I & II
Claw the Unconquered
Cleric
Travis Clevenger (Bloodhound)
Clipper I & II
Clive Yorkin
Clock King
Cloudburst
Clown
Cluemaster
Coagula
Cobalt Blue
Cobert, Catherine
Cobweb (America's Best Comics)
Codename: Assassin
Coeus
Coldsnap
Coldcast
Colonel Computron
Colonel Mason
Colos (Darkstar Colos)
Color Kid
Colossal Boy (see also Leviathan)
Colossus
The Comedian (see also Watchmen Elseworlds)
The Comet (Impact Comics)
Comet I & II
Comet Queen
Commander Steel
Commander Yank
Composite
Composite Man
Composite Superman
C.O.M.P.U.T.O.
General Computron
Conduit
Congo Bill and Congorilla
Conjura
Conjurer
Constantine, John (see Hellblazer)
Construct
the Contessa
Control Freak (see also Teen Titans (animated series))
Copperhead
The Corinthian
Cornelius Stirk
Corona
Corrigan, Jim (see Spectre)
Corrosive Man
Cosmic Boy
Cosmic Clown
Cosmic King
Count Vertigo
Counter Evolutionary
Cover
Crackle
Crazy Jane (of Doom Patrol)
Crazy Quilt
Creeper I & II
Crime Doctor
Crimelord
Crimesmith
Criminal from Tomorrow
Crimson Avenger I-III
Crimson Fox
Crispus Allen
Crius
Croc
Cronus
Cross Christina
Crowbar
Cruiser
Crumbler
Crystal
Crystallex
Culp
Custer, Jesse (see Preacher)
The Curse
Cutless Charlie
Cybercat
Cyberion
Cyborg I & II
Cyborgirl
Cyborg Superman (also the Cyborg)
Cyclone Kids
Cyclotron
Cyclotronic Man
Cypher
Czonk
Da' Bomb
Dagger
Dagon
Damage
Damien Darhk
Damon Matthews
Dan Hunter
Dan The Dyna-Mite
Dane Dorrance
Willis Danko
Danny the Street
Dark Angel
Dark Claw (Amalgam Comics)
Dark Destroyer
Dark Flash
Dark Lantern
Dark Light
Dark Man
Dark Nemesis
Dark Opal
Darkseid
Darkstar
Darkstar Colos
Dart
Daryl Rutabaga (Amalgam Comics)
Dava
Dawg (see Lobo)
Dawnstar
Dazzler
Deacon Blackfire
Deadeye
Deadline
Deadman
Deadshot
Death (DC/Vertigo)
Death Angel
Deathbolt
Death-Doll
Deathstroke
Deathtrap
Deathwish (Milestone Comics)
Delight (now Delirium)
Deathwing
Decay
Deep Blue
Deimos
Delirium (formerly Delight)
Demolitia
The Demon I & II
Demon Damsel (Elseworlds)
Demonia
Dementor
Dent, Duela (see The Joker's Daughter)
Dent, Gilda (see Gilda Dent)
Dent, Harvey (see Two-Face)
Dervish
Desaad
Desire
Despair
Despero
Destiny I
Destiny II
Destroyer 171
Destruction
Detective Chimp
Devastator
Devastation
Dev-Em
Devilance
Alexandra DeWitt
Marc Diamond
Diamondeth
Diamondette
Sue Dibny
Ding Dong Daddy
Disdain
Disruptor
Djinn
Doc Duggan
Doctor Alchemy
Doctor Anamoly
Doctor Bedlam
Doctor Bongface (Amalgam Comics)
Doctor Cale
Doctor Clever
Doctor Cue
Doctor Cyber
Doctor Darkk
Doctor Death
Doctor Destiny
Doctor Doome
Doctor Doomsday (Amalgam Comics)
Doctor Doog
Doctor Double X
Doctor Hugo Strange
Doctor I.M. Smart
Doctor Iker
Doctor Kryptonite
Doctor Fate I-IV
Doctor Freak
Doctor Laff
Doctor Light (superheroic - Kimiyo Hoshi)
Doctor Light (villainous - Golden Age, Jacob Finlay, Arthur Light)
Dr. William Magnus (see Veridium)
Doctor Manchester Black
Doctor Manhattan (of Watchmen)
Doctor Midnight
Doctor Mid-Nite I, II, III (alias Charles McNider, Beth Chapel, Pieter Cross)
Doctor Mist
Doctor Moon
Doctor Occult
Doctor Phosphorus
Doctor Poison I & II
Doctor Polaris
Doctor Psycho
Doctor Regulus
Doctor Sivana
Doctor Spectro
Doctor Strangefate (Amalgam Comics)
Doctor Thirteen
Dr. Togg
Doctor Trap
Doctor Tyme
Dr. Tzin Tzin
Dr. Ub'x
Dr. Z.Z.
Dr. Zecharia Leight
Doiby Dickles
Dollar Bill (see also Watchmen)
Doll Man
Doll Girl
Dolphin
Domain
Dominus
Donna Troy (Wonder Girl, also a Darkstar, and Troia)
Dorothy Spinner (of Doom Patrol)
Dane Dorrance
Donovan Caine
Don Grieco
Doom Mathematic
Doomsday
Dorian, Emile (see Doctor Emile Dorian)
Double Dare
Double Down
Dove I-III
Download
Richard Dragon
Draaga
Dracon
Dragon
Dragon King
Dragonlord
Dragonmage
Dragonsword
Dragoneer
Drake, Jack (see Jack Drake}
Drake, Tim (see Tim Drake)
Drakon
Constantine Drakon
Drax
Dream (see Morpheus)
Dream
Dreamer (see also Dream Girl)
Dream Girl (see also Dreamer)
Dreamslayer
Drive-Thru
Drone
Droom
Druid I & II
Duality
Dubbilex
Duchess (see Lashina)
Duke of Deception
Duke of Oil
Duke Mephisto Saturno
Duma
Dumas
Dumb Bunny (of Inferior Five)
Dummy
Duran
Dust Devil
Dust, Nathaniel (see Nathaniel Dust)
Duo Damsel (see also Triad, Triplicate Girl)
Dybbuk
Dynamo Boy
Eagle Boy
Eagleman
Earl of Greed
Earthworm
Echo I-IV
Eclipso
Ecstasy
Edge
Eel
Effigy
Effron the Sorcerer
Egg Fu
Ekin-Tzu
Elasti-Girl
Elasti-Man
Elastic Lad (see Jimmy Olsen)
El Dorado
El Diablo
Electron
Electric Blu
Electric Man
Electric Warrior
Electrocutioner
Element Girl
Element Lad
Element Man
Elemental Woman
Elephant Man
El Espectro
El Gaucho I & II
Elongated Man
El Papagayo
Elu
Emerald Empress
Empress (alias Anita Fite)
Empress of Venus
Encantadora
Enchantress
Enemy Ace
Enforcer I & II
Epoch, Lord of time
Epsilon
Equus
Eradicator I & II
Erewhon
Eryx
Esak
Esper Lass
Ether
Etrigan (see Demon (comics))
Evil Star
Eviless of Saturn
Evolvo
Extant
Extraño
The Face
Facade
Faceless I & II
Fadeaway Man
Fadeaway Outlaw
Faith
Falcon
Falcone, Carmine (see Carmine Falcone)
Fallen Angel
False-Face
Fang
Dr. Fang
Faora
Fastback (alias Timmy Joe Terrapin)
Fastbak
Fastball
Fatality
Fate
Fausta
Felix Faust
Sebastian Faust
Fear and Loathing
Feast
Ferro (see also Ferro Lad)
Ferro Lad (see also Ferro)
Fetish
Fever (alias Shyleen Lao)
Fiddler
Fiero
Film Freak
Finale
Fire (formerly Green Flame)
Firebird
Firebrand
Firebug
Firefist
Firefly
Firehair
Firehawk
FireHeart
Fire Jade
Fire Lad
Firestorm I, II & III
Fisherman
Rick Flagg
Flamebird I-IV
Flare
Flash (I - Jay Garrick, II - Barry Allen, III - Wally West, IV - Bart Allen)
Flash of 23rd, 27th, 28th, & 853rd Century
Fleshburn
Fleur-de-Lis
Flex
Flex Mentallo
Flicker
Floronic Man (also "Floro")
Flow
Fluxus
Flygirl
The Fly (Impact Comics)
Flying Dutchman
Flying Fox
Fog
Folded Man
Fool
Forager
Force
Fox
John Fox
Foxglove
Franklin Stern
Freak
Freckles Marvel
Freedom Beast
Freemont, Cheyenne (see Cheyenne Freemont)
Fright
Fringe
Frostbite
Funky Flashman
Eddie Furlow
Fury I & II
Fusion (of Metallik, see Team Titans)
Futureman
G.I. Robot
G'nort
Gabriel
Robert Gadling
Gamemnae
Gambler
Gamorola (Amalgam Comics)
Laurel Gand
GangBang
Gangbuster
Guy Gardner
Garrick, Jay (see Flash)
Gargoyle
Garguax
Garn Daanuth
Garv
Gates
Gaucho
Gay Ghost
Gear
Gearhead
Gehenna
Geist
Gemini
Gemm- Son of Saturn
General
General Glory
General Immortus
General Zahl
General Zod
General Zolog
Genius Jones
Gentleman Ghost
Geo-Force
Geomancer
Georgia
Germ-Man (Elseworlds)
Getaway Genius
GH=DRO
Ghast
The Ghost
Giganta
Gillotina
Gimmix
Girder
Girl Archer
Giz
Gizmo (alias Mikron O'Jeneus)
Glimpse
Glorious Godfrey (alias G. Gordon Godfrey)
Glory Shredder
Gloss
Gnaark
Goblin Lord (Elseworlds)
Godiva
Godthing (Amalgam Comics)
Gog
Gold (alias Mike Magnus)
Gold Kidney-Lady (Amalgam Comics)
Golden Arrow
Golden Eagle I & II
Golden Gladiator
Golden Glider
Golden Guardian (Elseworlds)
Goldenrod
Goldface
Goldie
Goldilocks
Goldstar
Golem
Goraiko
James Gordon
Gorgeous Gilly
Gorgon
Gorgon the Terrible
Gorilla Boss of Gotham CIty
Gorilla Grodd
Goth
Gowon Winter
Grace Choi
Granny Goodness
Grayson, Dick (see Robin)
Gravedigger
Gravedigger Lad (see Jimmy Olsen)
Gray Lady
Grayven
Grax
Great White
Great White Whale
Green Arrow
Green Arrow II (see Connor Hawke)
Green Cigarette
Green Flame (see Fire)
Green Lantern (I - Alan Scott, II - Hal Jordan, III - John Stewart, IV - Guy Gardner, V - Kyle Rayner)
Green Lanterns of other worlds
Green Man
Greyshirt (ABC Comics)
Grey Man
Gridlock
Griffin
Grifter (Wildstorm)
Grimbor the Chainsman
Grossout
Grouse
Solomon Grundy
Grunt
Guardian I-III
Guillotina
Gunbunny
Gunfire
GunHawk
Gypsy
Is that enough yet for you :)