Luna
Lunatic
Lunchbox
Lunchmeat
Lunzie
Lupin
Lurch
Lurk
Lurkmeister
Lurky
Luron
Luschia
Luther
Lutin (French for pixie)
Lux (latin for "light")
Luxor
Luzie
Lycos
Lycus
Lydia
Lyndon Johnson
Lynx
Lyonhart
Lyonne (short for Lioness)
Lypsinka
Lyra
Lyric
Lysanne
Lyz
Lyzen