Thank you! It's greatly appreciated!
I did give geneologybank a try last year and didn't find it too useful. BUT it was around the time I first started so I probably find it more useful now than I did then.
I did find William in the 1940 census. The women are hard to find when they get married and you don't know the new name. I believe did come across a death index a Nellie Kolander in CT a few months ago. My great grandfather moved from NJ to CT in the 1920s and then my grandfather followed in the 1930s. Olga was my great grandfather's sister. It is possible they may have moved to CT after the 1940 census but don't know for sure.
Thanks again for your help!