Yo, Col! Where have you been? No note from your mother, nothing!
Two possibilities spring to mind.
'Big Uggy' - caveboy character plus pet dinosaur, Dopey (Dokus...geddit?), in the Topper. Certainly around in the 70s, possibly 80s as reprints.
Or Klogg, a football-playing caveman, invented, written and drawn originally by Roger, and which I had the great pleasure and privilege to ghost in its final years. Can't recall the actual publication it appeared in (Roger?), but it was almost certainly soccer-related.