The Genealogica Arnulfi Comitis names (in order) "Karolum quoque postumum et Irmintrudim" as children of "Hlodovicus rex…ex Adelheidi regina". According to Settipani, Ermentrudis was the daughter of King Louis by his first marriage, although he cites no primary source on which this is based. It is certainly correct that the chronology is tight for Ermentrud to have been the daughter of her father's second marriage, assuming that the affiliation of her supposed daughter Kunegund is correct... Nothing is known about the husband of Ermentrud. Ermentrud & her husband had one child. 1
Research Notes: