Shem (Sceaf) (Sam)'s father was Noah (Nuh). His paternal grandfather was Lamech (Lamk). He was an only child. Shem (Sceaf) (Sam) is no longer alive.
General Notes
This is the traditional descent of the British Monarch's from Biblical sources as recorded in the Anglo Saxon chronicles, which show Bedwig as being Sam's son. The Icelandic Prose Edda shows a much more credible history which shows descent from the Kings of Troy. I therefore go with the Prose Edda, but both are oral histories.