In 1791, he and his brothers received Royal Spanish grants on Bayou Boeuf. The next year Dupré married Théotiste Roy of Pointe Coupée Parish, in Opelousas.
Dupré and his brothers acquired land grants from the Spanish crown in 1791 for Bayou Boeuf. In 1792, he wedded Théotiste Roy of Pointe Coupée Parish in Opelousas.