Located the 1940 census record of the Elvin Cox household in Butler County, Kansas. Elvin is my maternal 3rd cousin 4 times removed. Our common ancestors are Charles Davis and Hannah Piggott. He is also my 6th cousin 5 times removed through James Brown and Honour Clayton. His wife, Lavina, is my 1st cousin 5 times removed through John W. Davis and Mary Barker. Hannah's parents were Nathan Davis and Dinah Kemp Hobson. Elvin's parents were Reuben Cox and Eliza Jane Pearson.
At the time of the enumeration, Elvin and his wife were living in Richland Township. The census states that Elvin owned his home and that it was a farm valued at $1000. Elvin was 64 years old and born in Kansas. His wife, Lavina, was 64 years old and born in Indiana. In 1935 their residence was the same place.
The record shows that Elvin had completed the 8th grade and that Lavina had completed 4 years of high school. Elvin's occupation was listed as a farmer, and Lavina had no occupation listed.
According to my database, they were the parents of nine children, none of whom were living with them in the 1940 census. Their names were : Genevieve, Evadne, Waldena, Kermitt Merrill, Marcella, Rhonda, Elvin Smilas, Victor S., and Vestal H.
If you have any additional information or are related to this family, I'd love to hear from you.