This is a list I have of all the initial players and their characters. The only female in this group is "Tasha" of the Hideous Laughter spell, but her true identity is unknown, as far as I know.
Mordenkainen - Gary Gygax
Bigby - Gary Gygax
Zigby - Gary Gygax - Gary's Dwarf Fighter
Riggby - Gary Gygax
Yrag - Gary Gygax
Otiluke - Luke Gygax - A combination of PCs played by Luke Gygax
Melf - Luke Gygax
Tenser - Ernie Gygax - "Ernest"
Serten - Ernie Gygax - "Ernest"
Otto - Rob Kuntz
Robilar - Rob Kuntz
Terik - Terry Kuntz - Rob Kuntz's brother
Drawmij - Jim Ward - not an actual PC
Rary - Brian Blume - A low-level PC played by Brian ("Medoium Rary")
Tasha - N/A - Named for a young girl who began writing Gary in crayon at about age five, eventually submitted the spell named for her
Heward - Hugh E. Burdick - An NPC based upon a cousin of Gary's
Murlynd - Don Kaye - Don Kaye started TSR with Gary G. and Brian Blume, and passed away shortly thereafter.
Nystul - Brad Nystul - B. Nystul was a stage magician, in fact!
Leomund - Len Lakofka
Evard - A name created for dramatic purposes
Keoghtom - A dramatic persona for an old friend deceased when Gary wrote the game
Xagyg Yragernae - NPC, an anagram of Gary's name.