Your grandfather must have been a cousin to my great-grandmother, born Clerinda Derouin, 1890 in Escanaba.The family lived in the Bark River and Escanaba area.Her father:Jean-Baptiste Derouin.His brothers were: Pierre, b 1845; Toussant, b. 1849; Michel, b. 1850; Wilfrid, b. 1852; Moyse (Moise) b. 1853; and Napoleon, b. 1865.Quite possibly one of these is your granfather's father.