Frederick I, Count of Vaudémont

Frederick I, or Ferry I of Lorraine (9 January 1369 – October 25, 1415 in the Battle of Agincourt ) was a Count of Vaudémont.

He was the son of Duke John I of Lorraine (1346-1390) and Sophie of Württemberg (1343-1369). He was a younger brother of Charles II. In 1394, 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,
 * Frederic, Lord of Rumigny,
 * Charles, Lord of Bovines, and
 * John, Lord of Fleurines

Dynastic problems in the senior line caused his great-grandson René of Vaudémont to become Duke of Lorraine as René II in 1473.