OSTMARK Thietmar

Abt 0920 - 0979  (59 years)

• Name	OSTMARK Thietmar
  Birth	Abt 0920	Heiliges Römisches Reich
  Gender	Male
  Death	03 Aug 0979	Heiliges Römisches Reich
  Notes	Thietmar was the son of Christian, Graf in Gau Serimunt and his wife Hidda, the sister of Gero, Margrave in Saxon-Ostmark.[1] His date of birth is unknown but possibly about 920-925 based on being named as Graf in Schwabengau in 944.[1] As mentioned above he was Graf in Schwabengau from 944-978, succeeded his father as Graf in Gau Serimunt and from about 975 was Graf in the Mark of Merseburg and Mark of Meissen.[1] He married Suanhild von Sachsen the daughter of Hermann 'Billung', Duke of Saxony.[2],[3] They had issue; Gero II[1] Thietmar died on 3 August 979.[2]His widow married secondly Ekkehard I, Margrave of Meissen, who died 1002, and she died on 26 November 1014.[2] Sources ↑ 1.0 1.1 1.2 1.3 Detlev Schwennicke. Europäische Stammtafeln, neue folge, Band I.1. Die fränkischen Könige und die Könige und Kaiser, Stammesherzoge, Kurfürsten, Markgrafen und Herzoge des Heiligen Römischen Reiches Deutscher Nation, Frankfurt Am Main: Vittorio Klostermann, 1998. Tafel 149. ↑ 2.0 2.1 2.2 Stewart Baldwin, Todd A Farmerie & Peter Stewart, 'Hermann Billung, Duke of Sachsen (Saxony), d. 973' in The Henry Project: The Ancestors of King Henry II of England. Online American Society of Genealogists https://fasg.org/projects/henryproject : accessed 31 July 2025). ↑ Cawley, Charles. Medieval Lands: A prosopography of medieval European noble and royal families. Hosted online by the Foundation for Medieval Genealogy (FMG), accessed 2025, Markgragen der Sächsischen Ostmark. See also: https://en.wikipedia.org/wiki/Thietmar,_Margrave_of_Meissen
  Person ID	I59408	Freeman-Smith
  Last Modified	27 Jan 2026

  
  

  Father	von SERIMUNT Christian,   b. 0872, Nordthüringgau, Saxony, Deutschland d. 15 Jun 0950, Nordthüringgau, Saxony, Deutschland (Age ~ 77 years)
  Relationship	natural
  Mother	von MERSEBURG Hidda,   b. 0882   d. 0970, Jerusalem (Age ~ 88 years)
  Relationship	natural
  Family ID	F26387	Group Sheet  |  Family Chart

  
  

  Family	BILLUNG Schwanehilde,   b. Abt 0945, Westburg, Sachsen, Germany d. 26 Nov 1014, Meißen, Meissen, Sachsen, Germany (Age 69 years)
  Children	1. van der Lausitz II Gero,   b. Abt 0970   d. 01 Sep 1015 (Age 45 years)  [Father: natural]  [Mother: natural]   2. EKKEHARDINER Mathilde,   b. Abt 0990, Markgrafschaft Meißen, Heiliges Römisches Reich d. 02 Feb 1040, Germany (Age 50 years)  [Father: Stepchild]  [Mother: natural]
  Family ID	F26386	Group Sheet  |  Family Chart
  Last Modified	27 Jan 2026