 Lachlan's son John George McTavish soon became a fur trader with the North West Company under Simon's patronage.However, the Dunardry Estate passed to Simon's son William, and then to Simon Jr. (both died young), and the property revered back to Lachlan's son, Dugald MacTavish of Dunardry,WS, who sold it to Malcolm of Poltallach.Back in the 18th century Lachlan's son, Dugald, under age in 1796, did not register the MacTavish arms; and as a grown man, with his duties as the Sheriff Substitute of Kintyre he obviously did not feel inclined to do so, as he was, already, legally known as MacTavish of Dunardry.