Jerker is not an uncommon name in Sweden. Other names from Scandinavia which might amuse our English speaking friends are Odd, Urban and Love.

I read somewhere (I think Freakonomics) about a man who named his first son Winner and then had a second son, who was named Loser. Winner went on to become a petty criminal going in and out of jail, Loser became a fireman (or possibly police) and called Lou by his coworkers.