Thank you for all the research you did on my behalf. I did have some of this, as I have been working on the family for a long time. Our biggest questions arise after Eduard (Edward) left the family around 1938/39. Last week my in-laws sent me a packet of a few letters and a newspaper clipping that confirm that he was in the Navy during WWII, stationed at various Florida bases, then Norfolk. He graduated from U. of Miami, served a couple years on the West Miami City Council and taught government at the Shenandoah Jr High School. The newspaper clipping has no date on it, unfortunately. At some unknown date, he and his last wife Gertrude Evans (I think they married shortly after the War, probably in the Miami area) moved, ending up in Tifton, Tift, Georgia, where he died in 1979.
I was curious what record you found for the son born in Canada. This is my father-in-law and while I do believe he has a copy of his birth record himself, I don't think I have found one online. His father spelled his name differently on his application for citizenship: Gesinus (but I don't know if that was how it was spelled at birth.)