Petyr

Petyr Baelish, more often known as Littlefinger, is a central character in HBO's Game of Thrones, an inveterate schemer who rose from humble beginnings to become a crucial member of the Small Council in King's Landing. He's usually seen as a villain, though he has some fans. If one of them wanted to use this spelling of the classic Peter, it would be easy to get away with. As long as they're OK signing their sons up for a lifetime of misspellings.

Pronounced PET-ur.