Entering of a complete name change.

I have a person that was born in the USA in 1917. (I have a copy of his birth cert.) It appears that his father deserted. His mother returned to Sweden with him. He changed his first name and last name. (Kept his middle name.)He married, had children and grandchildren. Is there a way to show both names? Should one be an AKA? If so my preference is to put his birth name as an AKA. But is this correct?
Thanks,
Betty Dahlstedt