Another common name

So not only does my husband have a very common last name, Green, which makes that ancestor hunt difficult, he has to throw in a John Nelson.  Serious?

We do know John Nelson was born in Sweden (big surprise) ABOUT 1863.  No death date.  He was married twice.  First to Bertha Anderson from Norway in 1888.  They had three (known) children.  Second marriage to Henrietta Hansen, another Norwegian, in 1900.  They might have had 6 children.

I did find John Nelson & Henrietta in the 1930 census so now I need the 1940 one to see if they were still alive then.  Just trying to narrow down the date.