Frederick of Lorraine (1368 – October 25, 1415 in the battle of Agincourt) was a Count of Vaudémont. He was the son of Duke John I of Lorraine and younger brother of Charles II. In 1393, Frederick married Margaret the heiress of Vaudémont and Joinville, and became Count of these lands in her right. He founded the House of Vaudémont, a junior branch of the House of Lorraine. His children were: * Antoine, who succeeded as Count of Vaudémont, * Elisabeth, who married Philipp I of Nassau-Weilburg, and * Margaret, who married Thibault II of Blamont.