William (1081–1131) was count of Luxembourg from 1096 until his death in 1131, succeeding his elder brother Henry III. They were both sons of Conrad I and Clementia of Aquitaine. William was the first of his family to use the title count of Luxembourg in his documents.
- Occupation
- aristocrat
- Position held
- Count of Luxembourg
- Born
- 1081, 1078
- Died
- April 24, 1131
