What a touching story, and how sad that something must have happened to the father.
Malvin Anders Boyd was born in Bauge, Norway (source:)http://www.mailtribune.com/apps/pbcs.dll/article?AID=/201205...
Others who resided at Bauge, Skånevik, Hordaland, Norway and who emigrated to USA changed their Bauge farm name to Boyd and used that as a surname in America (see discussion here:):http://www.norwayheritage.com/snitz/topic.asp?TOPIC_ID=5881&...
One location for these individuals was Aurora, Kane, Illinois. Since Malvin's father was to meet his wife and son in Chicago, it would make sense that he might have lived in Illinois.
The usual source for Malvin's father's name would be Malvin's American marriage record and death record. The father's name can also be found in the Norwegian church books online by looking up Malvin's birth in the Skånevik church books. Seemingly you know Malvin's date of birth (about 1922?) and his mother's name (Bertha?). This information is key to correctly identifying Malvin in Norwegian records so you'll want to answer that question and post that information as a next step, if you are still searching.
Did Malvin also have a sister Solveig born in Norway ca 1920?
All best wishes