I was looking at a Bru family tree on Ancestry.com the other day at the library. I noticed pieces of information for Bertel Trulsen Bru Brue that I could provide.
Although I'm not sure you are the owner of the family tree I saw - you are the only person I found having posted messages about the same man.
Bertel Trulsen was born 28 Dec 1845 on the Bru farm/island. He was baptised on the 13th of Feb 1846 in Rennesøy parish, Rogaland, Norway. His parents were Truls Nilsen and Bertha Jørgensdatter. His was the second baptism in that church for the year and the original record in the Norwegian Lutheran church records can be seen here - https://media.digitalarkivet.no/en/kb20051213020987
Bertel was confirmed into the Rennesøy church in October of 1860. It appears that he had an older brother Tobias who was in the same confirmation class?https://media.digitalarkivet.no/kb20070103370723
In 1865 Norwegian census -http://www.rhd.uit.no/folketellinger/ftliste_e.aspx?ft=1865&...