"Engelberga (or Angilberga, died between 896 and 901) was the wife of Emperor Louis II and thus Carolingian empress to his death on 12 August 875. ...
As empress, she exerted a powerful influence over her husband.
She was probably the daughter of Adelchis I of Parma and a member of one of the most powerful families in the Kingdom of Italy at that time, the Supponids.
Born around 830, she probably spent her youth in Pavia. She married Louis II on October 5, 851, but did not play a role in political life until after the death of his father, Lothair I, in 855. Upon his death, Lothair's kingdom was divided between his three sons and, as the eldest, Louis received Italy and the title of emperor." - (en.wikipedia.org 10.08.2021)
