I had never heard of him before, but a woman painted by him as a young woman wrote and was trying to find her portrait by him. In my research, John Sanden wrote me the following:
"Ivan Olinsky was one of the most important artists in New York history."
In researching further, I found thirty-one of his portraits can be found at AskArt.com:
http://www.askart.com/theartist.asp?id=23863
When you get there, click on "image gallery" on the left.