 William's eldest son William Morgan sat as Member of Parliament for Monmouthshire from 1747 to 1763.His uncle Thomas Morgan (the son of John Morgan), known as "the General", was Member of Parliament for Brecon, Monmouthshire and Breconshire and served as Judge Advocate General from 1741 to 1768.His eldest son Thomas Morgan was Member of Parliament for Brecon and Monmouthshire.