Claude Lewis was an older brother of Sinclair Lewis. Mary Lewis was the first wife of Claude Lewis. She died in 1949.
Edwin Lewis was the father of Fred, Sinclair, and Claude Lewis.
Freeman Lewis was the son of Claude and Mary Lewis.
Grace Hegger Lewis was the first wife of Sinclair Lewis. They married in 1914 and divorced in 1928. Grace would later marry Telesforo Casanova. Both died in 1981.
Helen Lewis was the second wife of Claude Lewis. They married in 1950. Helen died in 1980.
Judy was the wife of Freeman Lewis, son of Claude and Mary Lewis.
Virginia Lewis was the daughter of Claude and Mary Lewis.
Dorothy Thompson was the second wife of Sinclair Lewis. They married in 1928 and divorced in 1942. Dorothy would later marry Maxim Kopf in 1943. Sinclair Lewis and Dorothy Thompson had one son, Michael, who was born in 1930. He died in 1975. Michael was married twice - his first wife was Bernadette Nanse and would later marry Valerie Cardew after his divorce from Bernadette.