Good jokes !!
Only Joe Davis and his younger brother Fred have held both the World billiard championship and the World snooker championship.
Joe was billiards champion from 1928 to 1931 and held the snooker championship from 1927 to 1946. (For many of those years the tournament format was such that the defending champion received a bye into the final).
Brother Fred, then aged 67, won the billiards championship in 1980 (there were two world championship competitions held that year and Fred won them both). He was snooker world champion eight times between 1948 and 1956.
None of the modern day snooker players (or commentators) have come close to winning the world billiards championship (in fact few, if any, play the game competitively). The last top snooker player to get close was “Steady” Eddie Charlton who lost in the 1988 final.