One of them was married to Hugh, the son of Azzo, or Axo, a marquis of Lombardy, rich, powerful, and noble, (Gulielm. Appul. l. iii. p. 267,) in the xith century, and whose ancestors in the xth and ixth are explored by the critical industry of Leibnitz and Muratori. From the two elder sons of the marquis Azzo are derived the illustrious lines of Brunswick and Este. See Muratori, Antichita Estense.