His first wife was Héloïse Valentine Déot, who died in New York City on March 9, in childbirth.
His second marriage on April 8, 1869 to Marie Adélaïde Gaillant, widow of Jean Vigoureux.
Penabert began ihis activity in 1858 in Paris, under the name Penabert et Cie; he practiced at various addresses: 46 rue Basse du Rempart, 31 passage of Le Havre around 1864, 36/38 passage of Le Havre in 1875.
He opened two branches, 587 Broadway in New York and 108 Calle de la Havana in Cuba.
He became associated with Charles DeForest Fredricks (1823–1894) and his work was awarded a Silver Medal at the Paris World Fair in 1889.