Background
He was son of Antoine of Lorraine, Count of Vaudémont and Lord of Joinville and Marie, Countess of Aumale and Baroness of Elbeuf.
He was son of Antoine of Lorraine, Count of Vaudémont and Lord of Joinville and Marie, Countess of Aumale and Baroness of Elbeuf.
He is sometimes numbered Frederick V by continuity with the Dukes of Lorraine. This marriage put an end to the litigation which existed between the fathers of the bride and groom, in connection with the succession of the Duchy of Lorraine. They had six children:
Peter, d.1451
René II of Lorraine (1451–1508), Duke of Lorraine
Nicholas, Lord of Joinville and Bauffremont, died about 1476
Joan (1458-1451/25/1480), married Charles IV, Duke of Anjou in 1474
Yolande, married William II, Landgrave of Hesse in 1497
Margaret (1463–1521), married René of Alençon in 1488
In 1453 his father-in-law honoured him with the command of the troops that he sent to the Dauphin Louis to help him to fight the Duke of Savoy.
In 1456 René entrusted the government of the Duchy of Bar to Frederick, and in 1459 granted him the honorary title of Lieutenant-General of Sicily.