Very interesting, Durium! I never realised that he was the son of Robert and Sonia Delaunay, major figures in 20th century art, and favorites of mine:
http://en.wikipedia.org/wiki/Robert_Delaunay
http://en.wikipedia.org/wiki/Sonia_Delaunay
He was, of course, honored by John Lewis with "Delaunay's Dilemma".