The Annales Alamannicorum name (in order) "Purchardo et Uodalricho" as sons of "Purghart comes et princeps Alamannorum" specifying that they were expelled from Swabia when their father was killed in 911. The Annales Alamannicorum record the rebellion against the king of "Burchardus iunior" in 914.
He succeeded in 917 as BURKHARD II Duke of Swabia. "Heinricus…rex" granted property to "in pago Hegouue in eodem comitatu [Burchardi]…in loco Siginga" to "Baboni…comitis Burchardi vassallo" after consultation with "Burchardi, Ebarhardi, Chuonradi, Heinrici atque Utonis…comitum" by charter dated 30 Nov 920. It is not certain that "Burchardi" refers to the duke of Swabia, although the charter is dated during the period during which the title dux was not consistently used in contemporary documentation and no other Burkhard has yet been identified to whom it can refer.
He was killed during an expedition to northern Italy in support of his son-in-law Rudolf King of Burgundy. Herimannus records that "Burghardus dux" was killed in 926. The Annales Sangallenses specify that he was killed in Italy. 1
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