As a member of two trendy name categories, animal and occupational, this name broke into the Top 1,000 in 2004, and would make a nice tribute to an angler Grandpa.
The best known bearer, Fisher Stevens, pulled a switcheroo on his birth name Steven Fisher. Fischer (another possible spelling) Black was a distinguished economist.
Fisher is a fairly common surname, whose bearers include the family of Eddie, Carrie and Joely, actress Isla, food writer M.F.K. Fisher, and two legendary cartoonists: Bud Fisher, creator of "Mutt 'n' Jeff," and Ham Fisher, who invented Joe Palooka.