First a happy birthday wish for my oldest son, Marty. May you enjoy the day, the year, and many more to come!
I must go back and add this interesting article, for those who read what Wikipedia had given me already...about the Tancred part of the Norman rule in Sicily. I left a few days ago wondering how Tancred IV had been sired by a deceased Tancred III and a mother also either deceased or married to someone else...according to my Ancestry tree. (Insert emoticon here of looking crosseyed and confused.) I'm still working on that!
Here's another version of much the same story about the Crusades and the wars of Sicily and it's Norman rule (which says it only lasted 125 years, not 700.)
From Encyclopedia Britannica: