Have you ever seen the Japanese animation "Death Note", one of the main Characters' name is "L". Of course there are other names beginning with the letter L, but I can't remember now..lol
I watch cartoons a lot and there's: Lilo, Linus Van Pelt, Lola the bunny, Lola from Charlie and Lola, Leonardo from TMNT, Lisa Simpson, Lightning McQueen, Lotso from Toys 3, Lord Farqward from Shrek, Lazlo from camp Lazlo, Lois Lane from Superman, Luigi from Mario, Lex Luther...