Henry I, Count of Holstein-Rendsburg

Henry I, Count of Holstein-Rendsburg
Seal of Henry I from about 1295 to 1302
Spouse(s)	Heilwig of Bronckhorst
Noble family	House of Schaumburg
Father	Gerhard I, Count of Holstein-Itzehoe
Mother	Elisabeth of Mecklenburg
Born	1258
Died	1304

Henry I, Count of Holstein-Rendsburg (1258–1304) was the first Count of Holstein-Rendsburg.

He was the son of Gerhard I, Count of Holstein-Itzehoe (d. 1290) and Elisabeth of Mecklenburg (d. c. 1280). In 1285, he was able to persuade King Eric V of Denmark to release Duke Valdemar IV of Schleswig from captivity. After the death of his father, the surviving sons divided the county among themselves. Henry was awarded the division of Rendsburg. He was constantly at war with the Dithmarschen.

Shortly before his death he introduced a toll on imported goods. Half the proceeds went to Hamburg, the other half was divided between Holstein-Schaumburg and Holstein-Rendsburg. After the Holstein-Schaumburg line died out in 1640, the Holstein half of the proceeds went to the Duchy of Holstein. After the Dukes of Holstein died out in 1768, the proceeds went to Hamburg

The inscription in his seal reads: S (IGILLUM) * HINRICI * Comitis * HOLTSATIE * ET * EN * SCOWENBRCH (Seal of Henry, Count of Holstein and Schauenburg).

He married in 1289 to Heilwig (1265 – after 1324), the daughter of Count Floris of Bronckhorst. The couple had the following children: