Strange dog breed between a papillon and a golden retriever ?

Recently my parents' dogs had puppies. They own a both a male and female papillon and a male golden retriever. The female had 3 puppies 2 of which are definately to the other papillon. One, however, is alot bigger and kinda looks like it's part golden retriever. I have heard of mothers having puppies to multiple fathers. I just wanted to know if this is common and what the hell to call a cross between a papillon and a golden retriever.