Reinald IV, Duke of Guelders and Jülich

Reginald IV (c. 1365 – 25 June 1423) was the second duke to rule both Guelders and Jülich Reginald was the son of William II, Duke of Jülich and Maria of Guelders. He became duke upon his brother William's death in 1402 without issue. On 5 May 1405, Reginald married Marie of Harcourt, daughter of John VI, Count of Harcourt.

Reinald IV, Duke of Guelders and Jülich

Reginald IV (c. 1365 – 25 June 1423) was the second duke to rule both Guelders and Jülich Reginald was the son of William II, Duke of Jülich and Maria of Guelders. He became duke upon his brother William's death in 1402 without issue. On 5 May 1405, Reginald married Marie of Harcourt, daughter of John VI, Count of Harcourt.