[Footnote 60: 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.]