The primary source which confirms his parentage has not yet been identified, although his name suggests that he was the son of Siegfried [I]. The Chronico Eberspergense names "Sighardus" specifying that he was "consanguineus" of "Arnolfus cæsar filius Karolomanni". The Chronico Eberspergensi Posteriore names "comes Sighardus" in Bavaria specifying that he was "de genere regum [Karlomanni filii Ludwici Regis]". "Arnolfus…rex" gave a chapel at Ebersberg to "comes noster…Sigihart" by charter dated 1 Jan 888. "Arnolfus…imperator augustus" gave land in "comitatu Regingarii…Chaganinga" to "comiti et propinquo nostro…Sigihardo" by charter dated 8 Jul 896. "Hludowicus…rex" granted property to the church of Freising by charter dated 30 Nov 903 in which among "fidelium nostrum" was listed "Liutboldi illustris comitis et cari propinqui nostri, Sigihardi etiam", presumably indicating that Sieghard was also "propinquus" of King Ludwig...
The Chronico Eberspergensi Posteriore record the death "906 sequenti die post Dyonisii martyris" of "Sighardus comes" and his burial at Freising. The necrology of Ebersberg records the death "VI Id Oct" of "Sigihardus com pater Ratoldi". 1
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