Ray (Horatio, Raymond), Tolly, Bah, Barty, Bart (Bartholomew), Will, Willy, Wilber, Liam, Lee, Bill, Billy, (William), Ez, Ezzy, Zeke, Zee (Ezekiel)....Jay, Jamie, Jimi, Jim, (James), Mickey, Mikey, Mick, Mike, Kal, Kally, (michael), Nat, Nate, nathan, nay, Natty, Than, Nel, (Nathaniel).
Tbh OP, nicknames don't have to have anything to do with actually names. I know a Gabriel who is known as Angel, a Benjamin known as Bobby and a Rhoda known as Cherry.