I am believing that the question is "What city was founded by Pierre LeMoyne d'Iberville?"
The answer to that would be Biloxi, Mississippi - - -
On May 1, 1699, he completed a fort on the northeastern side of the Bay of Biloxi, a short distance inland from what is now Ocean Springs, Mississippi. This fort was known as Fort Maurepas or Old Biloxi.[2][3] A few days later, on May 4, Pierre Le Moyne sailed for France,[2] leaving his teenaged brother, Jean-Baptiste Le Moyne, as second-in-command to the French commandant, Sauvolle.