OLSEN

I am currently researching my family tree. I am back to my great grand father I have his name from a Marriage licence dated 22 December 1893. The spelling of his first name looks like INJIBURK (OLSEN) his son BERNHARD was my grand father, I belive he was a bosun, firstmate or captain born in Christiansand in 1855 and died in 1908. He married my grandmother Annie Murray from Liverpool ( Irish descended) and they lived in Liverpool. His father is listed as an " Iron Moulder". can anybody help me with this ?