Norwegian great grandfather

My great grandfather was Norwegian and came to Australia in 1865 1867 on bark Bastiaan Pot as a ships carpenter However we think he jumped ship and changed his name to Andrew Rodrom and lived in Australia from then on. His naturalisation certificate states he was born March 15 1834 Trondheim to Maren and Gabriel. However our searching of church records is difficult without his real name If we could find crew list of Bastiaan pot may give us a lead. Hopefully someone maybe able to help