Engebretsen (Englebretsen)

I have been trying to complete my family tree for many years. I have managed to gather a lot of information through heritage sites, but what happened to them when they came to NZ seems just as hard to piece together. The line I am following is Engebret Englebretsen & Elen Sophie Pedersdatter. The questions I would like answers to is what happened to their children. I have information regarding Gustave (my Grandfather), but not the other children Clara, Anna Caroline, Petter Emil, Alfred Carelius & Carl. Otto was 29 when he died so may not have had a family. thanks Scott