Who is Krona from Sarum: The Novel of England and what is their importance?

Krona is the great chief of Sarum in 2000 BC. He is a descendant of Krona the Warrior and is an eightieth generation chief. He has more than three thousand subjects in his realm which is one of the largest and most prosperous in Britain. Krona is married to Ina and has two sons. As is the custom, his half brother, Dluc, is the high priest. Ina and Krona had two sons who died in a storm at sea when they escorted a merchant ship from their land.