William was born in England during his father's exile, stayed there when his parents returned in 1185, and was handed over to Henry VI in 1193-94 as a hostage for Richard I's release.
He has been back in Germany since 1195-96 and stood in for Henry at Brunswick in 1197-98. He is fifteen on 1 January 1200 and follows Otto. The northern Welf lands grouped here, Lüneburg with its salt and the old Billung country of the Bardengau, with overlordship over the counts of Dannenberg and Lüchow and over Blankenburg in the Harz, are what he receives at Paderborn on 1 May 1202.
In 1200 they are still undivided.
Who he is
- Name
- William (Wilhelm von Lüneburg)
- Title
- Co-heir of the Welf allods (later styled lord or duke of Lüneburg)
- Since
- co-heir since 1195; Lüneburg is his only from 1 May 1202
- Born
- 11 April 1184 at Winchester; aged 15
- Family
- Welf; unmarried (he marries Helena of Denmark at Hamburg in summer 1202); no children
- Confidence
- high
de.wikipedia (Wilhelm von Lüneburg) and fmg.ac (Brunswick).
Overlord
Welf allods; no overlord.
What it holds
- Lüneburg: the Kalkberg castle, the saltworks and the town (see the town record)
- Bardowick, destroyed by Henry the Lion on 28 October 1189, with its collegiate church
- The Bardengau and the Ilmenau down to Uelzen (Oldenstadt)
- Overlordship of the counts of Dannenberg and of Lüchow (Lüchow's contested by the Brandenburg margraves)
- Overlordship of Blankenburg in the Harz
How it was acquired
Billung and Welf inheritance; division of 1202.
Allies and rivals
Neighbours: Bernhard's Lauenburg across the Elbe crossing (Bernhard lost Bardowick to the Welfs in 1189); the archbishop of Bremen and Verden to the west; Holstein and the Danes to the north (nsw sheet).
How things stand that morning
Undivided Welf land under the brothers' joint lordship; William backs Otto.
Wealth
Lüneburg salt, the richest single revenue of the Welf house, shipped down the Ilmenau to the Elbe and Lübeck; tolls on the Elbe crossings.
Military
The Kalkberg castle at Lüneburg; Welf vassals of the Bardengau; the counts of Dannenberg and Lüchow. No figures.
Threats
- Danish and Holstein wars spilling over the Elbe
- Ascanian claims from Lauenburg
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.
- 1 May 1202 (not yet)Receives Lüneburg, Dannenberg, Lüchow and Blankenburg at Paderborn.Depends on: The brothers agreeing. Stopped by: A family quarrel.
- Summer 1202 (not yet)Marries Helena, daughter of Valdemar I of Denmark, at Hamburg: a Welf-Danish alliance.Depends on: Danish policy. Stopped by: A Danish-Staufen understanding.
Where the sources disagree
- fmg says William was given as hostage to Henry VI in 1194; de.wikipedia says 1193 and that he was held in Hungary. Not material to 1200.
Evidence: William's life is well attested; the drawing of his lands anticipates 1202.
On the map: The Bardengau block is the Welf core of the later principality of Lüneburg cut down to what was Welf in 1200.
Primary sources for Welf
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
- Annals of Marbach (compiled to 1238, the section on 1198 to 1210 written in the early 13th century). Alsatian annals on the Staufen side of the Upper Rhine. Read online
- Annals of Reiner of Saint James, Liège, Reiner of Liège (1197 to 1230, kept year by year). Contemporary annals kept inside Liège. Read online
- Annals of Stade, by Albert of Stade, Albert of Stade (about 1240 to 1256). A world chronicle written at Stade in the 1240s from older Stade and Bremen annals. Read online
- Chronicle of Burchard of Ursberg, Burchard of Ursberg (about 1229 to 1230, reworked by Conrad of Lichtenau). Written a generation later by a fierce partisan of the Staufen and a critic of Innocent III. Read online
- Chronicle of Otto of St Blasien, Otto of St Blasien (about 1209 to 1210). A Swabian continuation of Otto of Freising written from the Staufen side. Read online
- Chronicle of Reinhardsbrunn; Chronicle of St Peter's, Erfurt (Erfurt chronicle in the 13th century; Reinhardsbrunn compilation about 1340 to 1349 from older annals). The two Thuringian chronicles. Read online
- Chronicle of the Slavs, by Arnold of Lübeck, Arnold of Lübeck (about 1209 to 1210). Arnold continues Helmold and writes from Lübeck, close to Danish, Welf and Baltic affairs. Read online
18 more in the sources library for The Rhineland, the Low Countries and the Swiss Lands.
Sources and studies
Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.