Jerry Browne for Guv'nor

What is Jerry Browne's nickname? The former infielder, who has a similar name to the former (and possibly future) California chief executive, has his nickname listed as "Guv'nor" on one of his first baseball cards, 1987 Topps Traded.

The SABR Bio Project and the Baseball Libary also list Browne's nickname as Guv'nor, which is actually British slang for "boss". However, according to the popular reference sites Baseball Reference and Wikipedia, his nickname is actually the more formal "Governor." So who is right?

According to his glove on this 1991 Donruss card, they're both wrong. The correct answer is "Gov".