Hans Halvorsen

I am l ooking for information on Hans Halvorsen, who is the father of my dad, Henry Halvorsen Brustad. He had at least three sons, Kjell, Stub and Tom and at least one daughter. He worked in a chocolate factory or shop at one time. My dad was born in March 1897 to Laura Larsen and Hans Halvorsen but they never married. Thank you for any help you can give me.