Никита Хониат
It was Manuel who suggested the marriage of his daughter Maria the Porphyrogenita to a son of William V. Since Conrad and Boniface were already married, and Frederick was in the priesthood, the only eligible son was the youngest, 17-year-old Renier. The Byzantine chronicler Niketas Choniates described him as handsome, blond (his hair "shone like the sun") and beardless.