Hi Jen;
The ship I have is the "Monrovian". According to the immigration document I have. Wm Julian, aged 20 is listed alone. I think he came over because his wife just had their first child. "Setting up house". On the next line down, it mentions Johanna Julian, age 40 and all her children. If we found the immigration document "before" the ship sailed, we will find William Julian, father, listed.
You mentioned Alfey. Its Alfred Charles and he was last born in Ontario Canada. Arthur and Alfred were the only children who emigrated to Oregon.
Sara