Peterson/Petersen - John Martin

John Martin Petersen/Peterson was born circa 1829. He left Norway and was married in Swansea (UK) in 1850. He was a mariner. On the marriage certificate his father is listed as GOLDMAN PETERSEN, a rope maker. That is all the information I have. Could he have come from Bergen, as I understand Bergen was a centre for rope making? Any help/advice would be welcome, though I am sorry there is so little information to go on.