Gero II, Margrave of the Saxon Ostmark

GERO [II] ([970/75]-killed in battle Gau Diadesi 1 Sep 1015, bur Kloster Nienburg). "Geronem marchionem" is named in the Annalista Saxo, which also records his parentage[73]. A boy [puer] in 980, which provides the basis for estimating his birth date range. Graf im Hassegau 992. Markgraf [der Lausitz] 993. "…Gero comes…" was among the witnesses of the charter dated 1013 under which "Henricus…imperator augustus" renewed his 1007 judgment concerning a dispute between Willigis Archbishop of Mainz and Bernward Bishop of Hildesheim[74], although it is not certain that this is the same person as he is described as "comes" rather than "marchio". Thietmar records the death of "Markgraf Gero" in battle against the Poles, dated to 1015, and his burial at Nienburg[75]. m ADELHEID, daughter of ---. 1015. The Annalista Saxo names "Athelheidhe" as wife of "Thietmarus marchio", but does not give her origin[76]. Thietmar names Adelheid widow of Markgraf Gero at her husband's burial[77]. Markgraf Gero [II] & his wife had one child:

i) THIETMAR [IV] (-10 Jan 1030, bur Kloster Helmershausen). The Annalista Saxo names "Thietmarus marchio" as son of "Geronis marchionis ex Athelheidhe marchionissa", when recording his death and place of burial[78]. "Henricus…rex" donated property of "in comitatu Dietmari comitis et in pago Volcfelt" to the church of Bamberg by charter dated 6 May 1007[79]. Graf im Schwaben- und Nordthüringgau 1010. Markgraf [der Ostmark] 1015. The necrology of Lüneburg records the death "10 Jan" of "Thiadmarus marchio"[80]. m ---. The name of Thietmar's wife is not known. Markgraf Thietmar [IV] & his wife had two children:

(a) ODO (-after 10 Jan 1030). The Annalista Saxo names "Odo marchio" as son of "Thietmarus marchio", specifying that he died without issue[81]. He succeeded his father in 1030 as Markgraf [der Ostmark].

(b) ODA (-before 1068). The Annalista Saxo names Oda as wife of "Willehelmus comes de Wimmare" and records her second marriage to "Dedoni marchioni", but does not give her origin[82]. The Genealogica Wettinensis names "Odam matrem Othonis marchionis de Orlamunde" as wife of "secundus filius [comitis Tiderici] Dedo"[83]. The primary source which confirms her parentage has not yet been identified. m firstly as his second wife, WILHELM [III] Graf von Weimar, son of WILHELM [II] "der Große" Graf von Weimar & his wife --- (-16 Apr 1039). m secondly as his first wife, DEDO [II], son of DIETRICH [II] Graf in Eilenburg [Wettin] & his wife Mathilde von Meissen (-Oct 1075). Markgraf der sächsischen Ostmark 1046.
[http://fmg.ac/Projects/MedLands/MEISSEN.htm#Christiandiedafter945]
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"Gero II (c. 975 – 1 September 1015 at Krosno Odrzan'skie) was the eldest son of Thietmar, Margrave of Meissen, and Suanhild the daughter of Herman, Duke of Saxony. He was therefore probably a grandson of Hidda and Christian of Thuringia and named for his great uncle Gero the Great. He succeeded his uncle, Hodo, as Margrave of the Saxon Ostmark including Mark Lausitz (Lusatia) in 993 upon the death of Hodo, Margrave of the Saxon Ostmark.
Gero was created Count of Hassegau in 992, just a year before becoming margrave. He died in his territory in battle with a Polish army of Boleslaw I in Gau Diadesi and was buried in his family's monastery of Nienburg. He was survived by his wife Adelaide (Athelheidhe) and one son, Thietmar, who succeeded him." [https://www.findagrave.com/memorial/96354710/gero_ii-of_the_saxon_o...]