Complex sentence: He was succeeded by his son, Thomas Arthur, who took part in the Forty-Five and on his return to France in 1746 was created Earl of Moenmoyne, Viscount Ballymole and Baron Tollendally, in the Peerage of Ireland, by the Stuart claimant.
Split into simpler sentences: He was succeeded by his son, Thomas Arthur, who took part in the Forty-Five. Upon his return to France in 1746 was created Earl of Moenmoyne, Viscount Ballymole and Baron Tollendally, in the Peerage of Ireland, by the Stuart claimant.