Swanhilde

-https://en.wikipedia.org/wiki/Thierry,_Count_of_Flanders#Family

His first wife, Swanhilde, died in 1132, leaving only one daughter:

1. Laurette of Flanders,[7] who married four times: Iwain, Count of Aalst; Henry II, Duke of Limburg; Raoul I of Vermandois, Count of Vermandois; and Henry IV of Luxembourg. Laurette finally retired to a nunnery, where she died in 1170.

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-https://fmg.ac/Projects/MedLands/FLANDERS,%20HAINAUT.htm#ThierryIdi...

 THIERRY de Lorraine, .. ... .... 

m firstly SUANHILDE, daughter of --- (-4 Sep 1132). "Suavehildis" is named "uxor enim Theoderici comitis" in the Cartulaire de Saint-Bertin, which records her death and specifies "pro qua ex cognatione consanguinitatis idem erat occulte" without giving further details of the family relationship[389]. The Flandria Generosa names "comitissa etiam Suanildis", when recording her death and the bad luck which resulted from her consanguinity with her husband[390]. No details are known about her parentage so speculation about the precise nature of the family relationship between husband and wife is pointless. "Theoderici…comitis Flandrie…cum generosa uxore mea Suanehilda" confirmed the privileges and possessions of the abbey of Saint-Pierre de Loo by charter dated 1130, subscribed by "Willelmo filio Philippi comitis"[391].

 Count Thierry I & his first wife had one child:

1. LAURETTA de Flandre ([1120]-Abbaye de Voorst, near Brussels 1170). .. ... ....

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