The obit says his six children survive him along with 7 gc (all except Matthew are in DPB online) & 2 gt gc (Wiley & Rowan not in DPB online) and his sister (Elizabeth) Raphael Mrs Duncan Urquhart b 1934.
https://www.saulsfh.com/obituary/RichardMark-Molesworth
His wife’s obit notice (names gc & gt gc - see above):
https://www.saulsfh.com/obituary/Margaret-Molesworth