Georginson - where do I start

This is my first step into researching an ancestor I have just recently discovered is from Norway. So where do I start ?? The only information I have is from his daughter's baptism in Berwick-upon-Tweed, England in 1810 Martha GEORGINSON b. April 2 1st daughter of James GEORGINSON mariner native of Norway wife Elizabeth ANDERSON (native this parish) I am wondering if his name has been completely anglicised. Without his birth place I am sure I am at a dead end but thought it worth seeing if someone on this forum can give me some suggestions. Thanks Lea-Anne