If he was born in NF in the 1920s, then he was born a British citizen. But then again, all Canadians born then were British citizens as well, since there was no such thing as Canadian Citizenship until 1947.
My Newfie grandafther was my only grandparent born in Canada his son (my dad) was born in Canada, but my mom was born in England . I was born here, so am I first, second or third generation Canadian ?