His Wikipedia entry is here and his obituary in The New York Times here, the latter indicating how he managed to escape captivity during World War 2, making it all the way from Stettin on the Baltic Sea to New York City. The two sources agree that one of his wives was Peggy Guggenheim's daughter Pegeen, but disagree as the his total number of wives.
Even though Hélion rejected abstraction, he remained Modernist in his depiction of representational subject matter. That is, he usually considerably simplified shapes, used flat areas of paint and distorted perceived colors. I go into a good detail of such practices in my e-book on art.