Where did Hollywood ice-skating clowns Frick and Frack get their names?

Werner Groebli, “Frick,” took his stage name from a border town in his native Switzerland.

Hansreudi Mauch, “Frack,” took his name from the German word forfrock.

The team of two clowns appeared in such films as Silver Skates (1942) and Lady, Let’s Dance (1943).