My real granfather's name was YU WAH YEN. Often nicknamed Tony?
He was originally from China; Hong Kong I believe, and he came to Liverpool, Merseyside UK. He was married to or lived with Martha Rodgers who was Scottish, they had six children, including Shirley and Sylvia.
He was in the merchant navy, as a cook. Do you know him or know of him? He might've died in the fifties?