Was this the old Eilertsen home in Brooklyn?

In the second image above, we see Ed Eilertsen's 1943 draft registration, filed in Minneapolis where he was attending seminary at age 18. 

He lists his father, Jack Eilertsen, as the person who will always know his whereabouts, and he gives Jack's address as 2256 Plumb 2nd Street in Brooklyn, N.Y.

Presumably, this was the family home where Ed grew up and where his parents still lived. 

Norwegian patronymics, or how the Eilertsens got their name

Not knowing much about Scandinavian surname etymologies, I was surprised to learn that Eilert is actually a given name and that Eilertsen was a surname assigned to someone who was a son of Eilert. 

This becomes quickly clear when you review the ancestry of Jacob Eilertsen, the Norwegian-born father of Edwin and Clarence Eilertsen. Jacob's ancestry going back several generations is readily discoverable using vital records and family trees on Ancestry.com,