Note from curator: While often listed as the son of Unruoch II of Friuli and Ava de Monza, this is unproven. Please see below. Married to Gisela of Verona. He is NOT the same as Everard di Friuli (who was likely his grandfather). They are often confused.

According to Todd Farmerie, his association with the family of Friuli is likely incorrect and may derive from the confusion of his identity with that of the two-generations-older Eberhard di Friuli, who also married a Gisela. According to medieval historian Todd Farmerie in 2011, "These are two completely different families, in completely different countries and living at different times. The names are just coincidence." [http://archiver.rootsweb.ancestry.com/th/read/GEN-MEDIEVAL/2011-09/...]

However, a number of research sources in German and Dutch, including the Stammtafeln Band II 1984 and the work of historian Eduard Hlawitschka, assign Eberhard as the son of Adelhard von Burc, himself a son of Eberhard margrave of Friuli and also an Unruochinger. This would make this Eberhard a grandson of the older man of the same name.

Sources:

http://www.manfred-hiebl.de/genealogie-mittelalter/unruochinger/ada...

Quelle: PhD Historiker Hlawitschka Eduard: Die Anfänge des Hauses Habsburg-Lotharingen. Genealogische Untersuchungen zur Geschichte Lothringens und des Reiches im 9., 10. und 11. Jahrhundert. Kommisions Verlag Thinnes Nolte OHG Saarbrücken 1969 Seite 163.

Source: PhD historian Hlawitschka Eduard: The beginnings of the Habsburg-Lotharingen. Genealogical research into the history of Lorraine and the Empire in the 9th, 10th and 11th centuries. Commision Publisher Thinnes Nolte OHG Saarbrücken 1969 Page 163rd. http://www.manfred-hiebl.de/genealogie-mittelalter/unruochinger/ada...

GRAFEN im ZÜRICHGAU

Zürichgau, with the town of Zürich in its northern part, lay east of Aargau.

1. GEROLD [IV] (-after 852). His name suggest that Gerold [IV] was closely related to the family of Graf Gerold [I] & his wife Imma (see Chapter 3.A). A charter dated 8 Feb 838 recording a donation to St Gallen is dated to "sub Keroldo comite"[604]. "Engilperti atque Cundperti diaconi ac nepotis sui" donated property "in pago Rotagewe in villa…Skefouua" to "Monasterium Maninseo" by charter dated 852 witnessed by "Kerolt comes, Kerolt filius eius"[605]. https://fmg.ac/Projects/MedLands/SWABIAN%20NOBILITY.htm#_Toc514513192

2. GEROLD [V] (-after 21 Mar 890). Ludwig II "der Deutsche" King of the East Franks donated property to Kloster St Gallen which had been taken by "Geroldus comes et potestati Zurigaugensis comitatus", by charter dated 26 Feb 875[606]. A charter of Emperor Karl III dated 17 Nov 887 relating to the restoration of Kloster Reichenau names "comes…Keroldus…cum coniuge nostra Hilthigarda"[607], it being assumed that the latter is an error for "coniuge sua". "Arnolfus…rex" granted property "in pago pago Quinzingouue in comitatu Hunolfi" to Kloster St Emmeran by charter dated 21 Mar 890 which names "Engildeo comes, Odalrich comes, Meginhart comes, Chunipercht comes, Kerolt comes, Rumolt comes, Geio comes"[608]. m HILTIGARDE, daughter of ---. The primary source which confirms her marriage has not yet been identified. https://fmg.ac/Projects/MedLands/SWABIAN%20NOBILITY.htm#_Toc514513192

1. EBERHARD [I] (-after 27 Jun 889). Graf im Zürichgau. The dating clause of a charter dated 27 Jun 889, under which “Perehtelo...” donated property to abbey, notes “sub dominatione Eberharti comitis et advocati sui Adalberti”[609]. same person as...? ---. m GISELA, daughter of --- (-after 911). The Annales Alamannicorum record that "Gisle…socrui Purchardi iunioris" donated all her property to St Peter's in 911[610]. One child: https://fmg.ac/Projects/MedLands/SWABIAN%20NOBILITY.htm#_Toc514513192

a) REGINLIND ([885/90]-Insel Ufenau 958 after 29 Apr). Reginlind's mother´s identity is confirmed by the reference noted above, but direct proof that Graf Eberhard [I] was her father has not yet been found. Regino records that "viduam Burchardi" married "Herimanno"[611]. The Liber Anniversariorum of Einsiedeln records in Aug the donation of "Stevegeia, Kaltbrunnen et Lindowa" by "domina Regelinda cum filio suo Burcardo duce"[612]. "Otto…rex" granted property "in pago Zuriggaui in comitatu Liudonis commitis" to "Erig" at the request of "Regilinde…comitisse" by charter dated 10 Mar 952[613]. "Otto…rex" donated property "in pago Engrisgouue in comitatu Uualtbrahtti in loco…Uuidhergis" to "matrone fidelique nostre Reginlind" at the request of "Burghardi ducis" by charter dated 29 Apr 958[614]. m firstly (before 911) BURKHARD [II], son of BURKHARD [I] Marchio in Rätien [Duke of Swabia] & his wife --- (-murdered Novara 28/29 Apr 926). He was installed as BURKHARD II Duke of Swabia in 917. m secondly HERMANN I Duke of Swabia, son of GEBHARD Graf im oberen Rheingau [Konradiner] & his wife Hidda --- (-10 Dec 949, bur Reichenau Island). https://fmg.ac/Projects/MedLands/SWABIAN%20NOBILITY.htm#_Toc514513192

2. ADALGOZ (-after 899). Graf im Zürichgau: the dating clause of a charter dated 7 May 893, under which “missi domini regis...Arnolfi...Hildibaldi” settled a dispute between Zürich abbey and “Ratine et Rihhilda”, specifies “sub comite Adalgoz”[615]. “Reginlind” donated property to St Gallen by charter dated 899 which names “Adalcozzum comitem”[616]. https://fmg.ac/Projects/MedLands/SWABIAN%20NOBILITY.htm#_Toc514513192

3. LIUTO (-after 16 May 960). The dating clause of a charter dated 26 Apr 925, which records an exchange of property between Zürich abbey and and St. Gallen, notes “sub duce Burchardo et comite Liutone...cum licentia Kerhardi advocati”[617]. The dating clause of a charter dated 28 Apr 946, which records the transfer of revenue to Zürich St. Peter’s church, notes “sub duce Herimanno et comite Liutone”[618]. "Otto…rex" granted property "in pago Zuriggaui in comitatu Liudonis commitis" to "Erig" at the request of "Regilinde…comitisse" by charter dated 10 Mar 952[619]. "Otto…rex" granted the church at Pfeffikon "in ducatu Alemaniæ in pago Zurichgeuua in comitatu Luitonis comitis…et in provincia Rhætiæ Curiensis in comitatu Adalberti comitis in villa Amadeo" to the monks of Disentis by charter dated 16 May 960[620]. https://fmg.ac/Projects/MedLands/SWABIAN%20NOBILITY.htm#_Toc514513192

4. EBERHARD [III] . Graf im Thurgau 957/971. m --- . The name of Eberhard's wife is not known. Graf Eberhard [III] & his wife had one child:https://fmg.ac/Projects/MedLands/SWABIAN%20NOBILITY.htm#_Toc514513192

a) LIUTGARD. The primary source which confirms her parentage has not yet been identified. The Liber Vitæ of Einsiedeln records the donation made in Jan by “comes Lantoldus et Lutgardis uxor eius”[621]. m LANDOLT [Lancelin] Graf von Altenburg, son of GUNTRAM "der Reiche" Graf im Breisgau & his wife --- (-991). https://fmg.ac/Projects/MedLands/SWABIAN%20NOBILITY.htm#_Toc514513192

5. BURCHARD [I] (-after 12 Apr 965). Vogt of Zürich castle: “Purchardus Turegiensis castri advocatus” reached agreement with the inhabitants of Uri over “decimacionem” by charter dated 22 Nov 955[622]. Graf im Zürichgau 963/965. “Burchardus comes...” witnessed a charter dated to [964/68] relating to a dispute involving “canonicorum...sanctis...Felici et Regule”[623]. "Otto…imperator augustus" granted property "in pago Thureguoe in comitatu Burchardi comitis" to "Kloster Disentis in pago Curiorum in comitatu Adelberti comitis" by charter dated 12 Apr 965[624]. https://fmg.ac/Projects/MedLands/SWABIAN%20NOBILITY.htm#_Toc514513192

6. GOTTFRIED [I] (-after 28 Jun 968). Graf im Gau Schwerza: "Otto…imperator augustus" donated property "in pago Bibligouue in comitatu Anshelmi in villa Chupinga" to the bishopric of Chur in exchange for property "predii…Adalberto filio Liutuuardi…in pago Suerzza in comitatu Gotefridi in villa Alemuntinga" by charter dated 22 Apr 966[625]. Graf [im Zürichgau]: a charter dated 10 Feb and 28 Jun 968 records the hearing of a dispute before “concilio Cotifridi comitis” in Zürich involving the convent of Zürich against “Coldbrigam”[626]. https://fmg.ac/Projects/MedLands/SWABIAN%20NOBILITY.htm#_Toc514513192

Quelle: PhD Historiker Hlawitschka Eduard: Die Anfänge des Hauses Habsburg-Lotharingen. Genealogische Untersuchungen zur Geschichte Lothringens und des Reiches im 9., 10. und 11. Jahrhundert. Kommisions Verlag Thinnes Nolte OHG Saarbrücken 1969 Seite 163.