According to Johann Peter Kirsch, in 856 Ingiltrud, wife of Count Boso the Elder, had left her husband for one of his vassals. Henry Hart Milman says that the Count abandoned his wife.
Johann Peter Kirsch and Henry Hart Milman offer different accounts of Ingiltrud's departure from Count Boso the Elder.  Kirsch claims she left for a vassal, while Milman suggests the Count himself abandoned her.