Who is Romieux of Provence from Avalon and what is their importance?

Romieux de Province (Rumon) was born just hours before the Lord Jesus. He was able to both write and draw, and he was descended from the great King Alfred and also from Louis L'Aveugle's line from Charlemagne - a prince twice over. He is described as being of dark complexion, fairly tall, with glossy black hair cut above the ears. Lean and clean shaven, he often wore a soft blue mantle with squirrel stitched in at the hem and held by a brooch at the shoulder. His long leather shoes were designed and his blue trousers were "cross gartered to the knee with linen strips". It was Rumon's task to deliver Merewyn to her family after Breaca of Uther died.