Complex sentence: The origins of the "Famille de Harville" are unknown, but it is quite possible that a the name is derived from St. Airy, the tenth Bishop of Verdun, whose name is the likely origin for the commune still there today.
Split into simpler sentences: The origins of the "Famille de Harville" are obscure, but not entirely unknown. It is quite possible that a the name is derived from St. Airy, the tenth Bishop of Verdun, whose name is the likely origin for the commune still there today.