The Fundatio Monasterii Sancti Pauli in Carinthia names (in order) "Engelbertus primogenitus, Sigfridus, Bernhardus et Heinricus" as sons of "Engelberto comite seniore". The Vita Chuonradi names "Engilbertum et Bernhardum" as brothers of Heinrich Duke of Carinthia.
He succeeded in 1107 as ENGELBERT I Marchese di Istria. The documents dated Feb 1111 relating to the coronation of Heinrich V King of Germany as emperor name "Fridericum filium sororis suæ, marchionem Engilbertum, marchionem Thiebaldus, comitem Hermannum, Fridericum palatinum comitem de Saxonia, Berlingarium de Bavaria, Godefridum comitem, Fridericum Saxonum, Albertum cancellarium, Cononem fratri Berengarii, Sigebot de Bavaria, Henricum ducem Carinthie, Bertoldum filium ducis Bertoldi" as the emperor's guarantors.
He was installed in 1124 as ENGELBERT Duke of Carinthia, until 1135. "Engilbertus tunc quidem marchio sed postea dux Karinthiorum" removed property donated to Kloster St Peter at Salzburg [before 13 Dec 1123], but by charter dated 1131 returned it to the archbishop of Salzburg, witnessed by "Pernhardus comes frater, Engilbertus marchio et Heinricus filii eiusdem ducis…".
The necrology of Baumburg records the death "Id Apr" of "Engelbertus dux". The necrology of Salzburg St Rudpert records the death "II Id Apr" of "Engelbertus dux Karinthiorum et m". The necrology of Seonense records the death "Id Apr" of "Engilbertus ex duce m n c" and his donation. 1
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