Mine is a complicated story. It all started in the MMORPG DragonRealms way back around 1995 or so, when it was still a featured option on AOL (before they moved to their own private servers). My username was LockeCole CelesChere (yeah yeah, FF6 fanboy, I know). This didn't exactly fit all that well in the RP-required environment (yes, DR is roleplay required. Any Out Of Character stuff must be confined to private whispers), so I opted for a name change a few years later. I chose Lockesly since it was inspired partially by the original name of LockeCole and partially by Robin Hood's name (Robin of Locksley). The surname was changed to L`Crit because I was in love with EverQuest at the time, and that was the name of most of the generic guards in the Dark Elf city of Neriak.
And thus, Lockesly L`Crit. I usually shorten it to lockeslylcrit for usernames.