Complex sentence: On his father's side, his ancestor was Isaac Pasquier from Poitou, who arrived in Nouvelle-France in 1665 as a soldier in the Carignan-Salières regiment.
Split into simpler sentences: On his father's side, his ancestor was Isaac Pasquier from Poitou, France. Issac Pasquier arrived in Nouvelle-France in 1665 as a soldier in the Carignan-Salières regiment.