Mine is lame. Cailin (pronounced Coll-een) is the Gaelic word for Girl. I was going to be cailin breoite (broe-tsha) which means "sick girl" but I went against it as it was pessimistic and just left it as Cailin. I was very sick and need to sign up in a hurry so the inspiration had left me!
And while we are at it...do you know how to pronounce my real name? For those of you who have not heard of Sinead O'Connor (former rock singer, she tore up a picture of the pope on Saturday Night Live)
Anyway...its SHIN-ADE (Shin like your leg, aid like Koolaid!)