Every hockey fan of a certain vintage knows who Frank Mahovlich is. His brother Pete, too. Heck, even non hockey fans today should still know how Frank Mahovlich. He is a Canadian senator, after all.
Here's a fun article looking at a time when The Big M was just emerging as a top NHL player. It seems not everyone knew how to pronounce his name. He figured when everyone learned how to say his name, he would know he's made it as a NHL superstar.