My family came from Feodosiya (now the Ukraine) to Glasgow. In the western world everything was just "Russian" back then. From there they spread out around the world (Brighton, Hove, Melbourne, Sydney, Auckland, Wellington). However recently I ran across some Zams in a British phone book, risiding in London, who appear to be Jewish, so I would say they are likely relatives. It must be as far back as "the old country" in the generation of my great-grandparents because I am not aware of them. They seem to be present in the UK from the 1930s to at least the 1960s.

Nahum J. Zam
Eugenie Zam
Martin J. Zam
Rene Zam
Anna Zam

Zam Family, Hendon Electoral Roll

It's possible Nahum was a cousin of my grandfather's. The only additional information I have is that Nahum, Eugenie and Anna were living together at 42 Sevington Rd, Hendon, in 1949. It's possible one of them may still be alive.