Scenario
Friends
Foes
Assets
Your father, Earl Sigurd was a mighty chief, commanding a large area of land in the north stretching from Orkney right through into the Hebrides. As his son, you may have influence in these parts.
Your mother's father, the King of Scots, proclaimed you 'earl' over Caithness and Sutherland in the north of the Scottish mainland. This is a strong power base, well-positioned to sail to the Orkneys.
You must be on good terms with the King of Scots and Norway. You have inherited a strong naval fleet.