There haven't been very many Joseph Vavaks in the world. At the moment, there might be a handful of us here in the United States. Not many more. Interestingly, the Smithsonian American Art Museum has six paintings by another Joseph Vavak.
Joseph Vavak was, as far as I know, unrelated to myself. Born in Austria in 1899, raised in Chicago and eventually passing away in Stotebury, Missouri in 1969. Most of the work I have found is from his time as a Works Projects Administration artist in Chicago during the 30's and 40's. Along with the Smithsonian, there are also paintings in the collections of the Illinois State Museum and the University of Kentucky Art Museum.
I plan on researching this Joseph Vavak more. It's fascinating to me that someone with the same (admittedly unusual) name as myself was such a wonderful artist.