Oscar Ollainsen

Help required, please. OSCAR OLLAINSEN born about 1858. His father was PETER (that's how it was written on OSCAR'S UK marriage certificate - though probably PEDER?) OLLAISEN/OLLAINSEN was a ship's carpenter (dead by 1880). In the 1881 UK census OSCAR'S place of birth in Norway is partially obliterated by the ennumerator. Could it be DRAMMEN or DRAMAND or even GRIMSTAD? I am trying to find a birth date for OSCAR to try to trace his descendants but there don't seem to be early birth, marriage and death records for the above places or those with similar spelling. Any help would be much appreciated. Taak.[:)]