Henry (died 886), a son of Count Poppo of Grapfeld, one of the first Babenbergs, was variously known as Count or Margrave of Saxony and Duke of Franconia. Henry was the ancestral lord of a castle, Babenberg, on the River Main, around which the later city of Bamberg was built. He enjoyed the favour of Charles the Fat and was his right-hand man in Germany during his reign. He led a surprise strike on a force of Vikings prior to the Siege of Asselt, but it was unsuccessful. Wikipedia
The definitive Wikipedia entry for Henry Of Franconia. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Henry_of_Franconia