My bettas are all named for characters in British literature. We have:
Pip- from Charles Dickens' "Great Expectations" (I'm working on buying him an "Estella," who Pip was in love with in that book, as a potential mate so I can breed him.)
Becky Sharp- from Thackeray's "Vanity Fair"
Othello, Desdemona, and Iago from Shakespeare's "Othello"
Oh yeah, and there's Captain Jack Sparrow, who doesn't exactly fit with the theme. But I found him at Walmart with advanced fin rot, and he only had 1 eye, so I wanted a piratey type name for him! lol