William III of Weimar

William III of Weimar (Wilhelmi Thuringorum praetor; died 16 April 1039) was count of Weimar from 1003 and of the Eichsfeld from 1022.

He was the youngest son of Count William II of Weimar.

Family

 * His first marriage was to Bertha.
 * His second marriage was to Oda (probably the daughter of Thietmar, Margrave of the Saxon Ostmark). They had children:
 * William IV (died 1062), Margrave of Meissen from 1046
 * Otto I (died 1067), count of Orlamünde
 * Poppo (died after 1046)
 * Aribo (murdered 1070)

After his death, Oda married Dedi I, Margrave of Lusatia.