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Wiki information Porthau:
Isaac de Porthau was a Gascon black musketeer of the Maison du Roi in 17th century France. In addition, he was the first cousin once removed of the Comte de Troisville, captain of the Musketeers of the Guard, and first cousin of Armand d'Athos....
Alain Porthault is a French former sprinter who competed in the 1948 Summer Olympics and in the 1952 Summer Olympics.