Adolph I, Duke of Cleves (Adolph IV, Count of Cleves and of Mark) (2 August 1373 – 23 September 1448) was the son of Adolph III, Count of Mark, and Margaret of Julich. Shortly before the year 1400 he married Agnes daughter of Rupert of Germany and Elisabeth of Nuremberg. Agnes died a year later with no issue. In 1406 Adolf remarried Marie of Burgundy, daughter of John II of Burgundy and Margaret of Bavaria, they had the following issue:

• Catherine (25 May 1417 – 10 February 1479) married Arnold, Duke of Guelders, on 23 July 1423
• John (1419 – 1481), successed as Duke of Cleves
• Elisabeth (1420 – 1488) married on 15 July 1434 Henry XXVI, of Schwarzburg-Blankenburg 1418 – 1488
• Agnes (1422 – 1446) married Charles IV, King of Navarre, on 30 September 1439 in Olite
• Helen (1423 – 1471) married on 12 February 1436 Henry "the Peaceful", Duke of Brunswick-Lüneburg (c.1411 – 1473)
• Adolph (1425 – 1492) married on 13 May 1453, to Beatrice of Portugal (1435 – 1462), daughter of Peter, Duke of Coimbra
• Mary (1426 – 1487) married Charles, Duke of Orleans; became parents of Louis XII, King of France

Other Family Members

The sister of Adolph I, Duke of Cleves, a certain Margaret of Cleves married and became the second wife of Albrecht of Bavaria. They held court together in The Hague.

Chart of Succession

Preceded by
Dietrich IX, Count of Mark Count of Mark
1398–1448 Succeeded by
Gerhard, Count of Mark
Preceded by
Adolf III, Count of Cleves Count of Cleves
1394–1417 Succeeded by
County of Cleves became Duchy of Cleves
Preceded by
New creation Duke of Cleves
1417–1448 Succeeded by
John I, Duke of Cleves

References

• stirnet.com Accessed September 9, 2007