https://en.wikipedia.org/wiki/Bertha,_daughter_of_Lothair_II

Bertha was the second illegitimate daughter of Lothair II, King of Lotharingia, by his concubine Waldrada.[1] She was renowned to be beautiful, spirited, and courageous. Ambition, coupled with her influence, involved her husbands in many wars.

Between 879 and 880, Bertha married her first husband, Theobald of Arles. A Bosonid, his father was Hucbert, whose brother-in-law was, Lothair II. Bertha and Theobald, had four children including two sons and two daughters: