Sorry for the delay in response - I had surgery and just got back to work. Today!
I have seen those Elias family members when looking for my own, but those names don't register other than being the names of Nic and Balty's children. Nic was born ca. 1833 and Balty ca. 1827. My -guess- still is that they are brothers or at the very least, cousins. Nic had only 1 son - John - born 1862 in Michigan - unsure if Detroit or in the Keweenaw. Balty had more children including sons named Nic, George, and John and Hubert.
I do know that Nic Elias died in Detroit in April, 1921. I have not located his son beyond the 1910 census (if it indeed is him) and that family didn't hear from him after he left home - looks like he ended up out west in Oregon and Idaho and died in 1917 as best as I can tell. His 4 sisters are all known to me (not personally, but in records) as well as their children.
Sorry I don't have more for you, but I can tell you that Nic moved his family for a short time to Stearns County, MN and is enumerated in the 1875 state census for Minnesota. They must have left soon after because the oldest daughter, Regina (my g-grandmother) married in 1877 to Henry Warbler whom she met in the Keweenaw - probably Central Mine.