Adelaide of Guelders

Adelaide of Guelders (Dutch: Aleid, c. 1182 – 1218) was the daughter of Count Otto I of Guelders and his wife, Richardis, the daughter of Duke Otto I of Bavaria and Agnes of Loon. Also known as Adelaide of Bellich or Alice of Guelders.

Probably around 1198, in Stavoren, she married Count William I of Holland. They had five children:
 * 1) Floris IV (24 June 1210 in The Hague–19 July 1234 in Corbie, France), succeeded his father as Count of Holland
 * 2) Otto (d. 1249), Regent of Holland in 1238–1239, Bishop of Utrecht
 * 3) William (d. 1238), Regent of Holland in 1234–1238.
 * 4) Richarda (d. 1262)
 * 5) Ada (d. 1258), Abbess at Rijnsburg from 1239 until her death

Adelaide died in 1218, while her husband was away on the Fifth Crusade. She was buried in Rijnsburg Abbey.