The count's brother and rival, reconciled after his revolt of 1195, holds Holland's half of the comital rights over Oostergo and Westergo and lives among the Frisians, who backed him against Dirk.
He is the male heir of Holland in a house with no son, married into Guelders, and the Frisians' friend: the man around whom the succession fight of 1203 will form.
Who he is
- Name
- William of Holland (later Count William I)
- Title
- Count in Frisia for Holland's half of Oostergo and Westergo (comes Frisie)
- Since
- About 1196-1197, after the uncles' mediation that ended his revolt
- Born
- About 1167-1170
- Family
- Younger brother of Dirk VII. Married in 1197 at Stavoren to Adelaide of Guelders, daughter of Otto I of Guelders. No child of his is recorded before 1200.
- Confidence
- medium
Took the cross with his father Floris III and his uncle Otto of Bentheim on Frederick I's crusade (1189). In 1195, backed by the Frisians of Oostergo and Westergo, some West Frisians and the count of Flanders, he attacked Kennemerland while Dirk was fighting the Flemings in Zeeland, and was beaten near Alkmaar by Countess Adelaide. Their uncles then mediated and gave him Holland's rights in Oostergo and Westergo, where he lived at Oosterzee (Blok).
He was later taken by treachery at Horst, escaped to Otto of Guelders and married his daughter (Blok). In 1203 he is called William of Frisia.
Overlord
His brother the count of Holland, for Holland's half of the Frisian comital rights
What it holds
- Holland's half of the comital rights (fines, dues, the right to call the Frisians out) in Oostergo and Westergo, shared with the bishop of Utrecht
- A seat at Oosterzee in the south of Frisia
How it was acquired
By the mediation of his uncles after the revolt of 1195.
Allies and rivals
Allies: the Frisians of Oostergo and Westergo; his father-in-law Otto I of Guelders; in 1203 Otto of Bentheim, Philip of Wassenaar, William of Teylingen, Walter of Egmond and the Kennemers. Rivals: his brother's wife Adelaide and her daughters; the bishop of Utrecht.
How things stand that morning
William is most likely in Frisia that winter (he is there in 1197 and in 1203; the winter itself is not pinned). He has no formal claim on Holland while Dirk lives, but as the only male of the house he is the obvious heir in the male line.
Wealth
The Frisian dues and fines of Holland's half; little else.
Military
No castles known; the Frisians who followed him in 1195. No numbers are recorded.
Threats
- Dirk and Adelaide choosing a daughter's husband as heir
- The bishop of Utrecht's half of the Frisian rights
What the year holds
What happened next, if nothing in play changes it. Each event carries what it depends on and what would stop it.
- 4 November 1203Dirk dies; William, then in Frisia, contests Ada's succession; Otto IV recognizes him as countDepends on: Dirk's death without a son Stopped by: A settled succession
Places of note
- Stavoren: Where William married Adelaide of Guelders in 1197
Where the sources disagree
Evidence: His revolt, marriage and Frisian title are attested; his seat at Oosterzee and his capture at Horst rest on Blok; his whereabouts that winter are inferred.
On the map: Holland's half of the Frisian rights is not drawn as ground: the Frisian lands rule themselves.
Primary sources for Frisia
Chronicles, registers, sagas and inscriptions written in or near 1200 that cover this entry. Each has its own page with editions, translations and where to read it.
- Annals of Egmond (12th century to about 1205). The house annals of Egmond, the counts of Holland's abbey, and the main native source for Holland around 1200. Read online
- Chronicle of the abbots of Wittewierum (Bloemhof), Emo of Wittewierum (from 1219 to 1237, continued by Menko to 1273). The chronicle opens only in 1204 with the founding of Emo's Premonstratensian house in the Groningen Ommelanden, so it has nothing for 1200 itself. Read online
Sources and studies
- William I, Count of Holland (en.wikipedia)
- Wilhelm I. (Holland) (de.wikipedia)
- Loon War (en.wikipedia)
- P. J. Blok, Geschiedenis van het Nederlandsche volk, deel 1 (DBNL), chapter on about 1160-1320
Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.