Manfred (1232 – 26 February 1266) was the King of Sicily from 1258 to 1266. He was an illegitimate son of the emperor Frederick II of Hohenstaufen but his mother, Bianca Lancia (or Lanzia), is reported by Matthew Paris to have been married to the emperor while on her deathbed.
more on https://en.wikipedia.org/wiki/Manfred,_King_of_Sicily