The primary source which confirms his parentage has not yet been identified. Markgraf in Rätien 891/911. "Hludowicus…rex" confirmed privileges to Kloster St Gallen by charter dated 24 Jun 903 in which among "fidelium nostrum" was listed "Purchart marchio Curiensis Rætiæ". "Hludowicus…rex" confirmed an exchange of properties between Kloster Fulda and Kloster Echternach after consulting "fidelium nostrorum comitum vero Kebeharti, Liutpoldi, Burcharti, Eginonis, Liutfredi, Iringi et Cunpoldi" by charter dated 19 Mar 907. "Hludowicus…rex" donated property "in pago Palanichoge in comitatu Egenonis in loco Ingilinstat" to Hatto Archbishop of Mainz after consulting "fidelium nostrorum comitum vero Burchardi, Egenonis et Ysaac" by charter dated 8 Jun 908.
[Duke of Swabia]. Herimannus records the death in 911 of "Burchardus dux Alamanniæ…orto tumultu occisus est". The Annales Alamannicorum record that "Purghart comes et princeps Alamannorum" was killed in 911 by "Anshelmo". 1
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