 His work in oology continues to be discussed in scientific publications.Notable members of his immediate family include his son, Dudley E. DeGroot, who obtained his doctorate degree in anthropology, and one of his daughters, Alice A. DeGroot, who became a large animal veterinarian holding patents for her inventions.DeGroot died at the age of 70 on May 5, 1970 at his home in El Cajon, California.