Not only was Gene Alfred Tennison your father, and Robert Tennison your grandfather, I have more information for you. Robert Tennison's father was Galen Monroe Tennison. Galen changed his name to George as an adult. His parents were Daniel Jackson Tennison and Charlotte Brand. Daniel's father was George W. Tennison, born 1803.
Daniel Jackson Tennison was my husband's great grandfather, so you are a cousin to Lowell! We can tell you so much more if you are interested. Please contact us privately at Lnstennyson@att.net
. -- Sandra and Lowell