Yoda has a first name. It is Minch.
http://en.wikipedia.org/wiki/Yoda . . .
Grand Jedi Master Yoda is among the oldest and most powerful known Jedi Masters in the Star Wars universe. Series creator George Lucas originally wished Yoda to follow his other characters in having a full name—Minch Yoda—but instead opted to have many details of the character's life history remain unknown. Yoda's race and home world have not been named in any media, canonical or otherwise, and he is merely said to be of a "species unknown" by the Star Wars Databank. Yoda's speech syntax has been analyzed and discussed by academic syntacticians, who found it somewhat inconsistent, but could extrapolate that "Yodic" has object–subject–verb word order.[8]