| Descent |
| Thomas Cassingham (Sr.) |
| Thomas Cassingham (Jr.) |
| James Austin Cassingham |
| Joseph Morrison Cassingham |
| Bertha Lois (Cassingham) Turner |
| Evelyn Rose (Turner) Olson |
| William Lee Olson |
William Lee Olson is the son of Evelyn Rose Turner and Elmer Ray Olson. He was born in 1954 in Kansas.
He married Gail Ilene Armstrong. She was born in 1952.
Children of William Lee Olson and Gail Ilene Armstrong:
- Lindsay Ann Olson was born in 1978 in Kansas.
- Lauren Alayne Olson was born in 1982.