Her eldest known Dennis ancestor is James Davidson Dennis. Charlie Dennis (Diana's Uncle) states that David was raised in Winnsboro, Tx and was a muleskinner and freight hauler on the Oregon Trail where he was once shot in the leg with an indian arrow. He knew Buffalo Bill & Wild Bill Hickock.
| Parents | |||||
| Paternal | Maternal | ||||
| Wilson Eugene Dennis | m1951 Guadalupe TX | Juanita Jean Davis | |||
| b1924 Llano TX | d1987 Oklahoma OK | b1932 Zavala TX | d | ||
| < Andrew < James | < John < Christopher < Columbus | ||||
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| Grandparents | |||||
| Paternal | Maternal | ||||
| Andrew Anton Dennis | m1822 Llano TX | Fannie Rose Barton | |||
| b1899 Llano TX | d1968 Bexar TX | b1895 San Saba TX | d1936 Llano TX | ||
| < James | < Thomas < Franklin < Thomas < David < Thomas < Thomas < Thomas < Thomas | ||||
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| Children: Infant Death / Wilson / Hallie / Charley | |||||
| 1st Great Grandparents | |||||
| Paternal | Maternal | ||||
| James Davidson Dennis | m1899 | Ida Elizabeth Sorrell | |||
| b1853 MS | d1937 Medina TX | b1877 Limestone TX | d1967 Bexar TX | ||
| < John | |||||
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| Children: Andrew / Arthur / James / Floyd | |||||
| 2nd Great Grandparents | |||||
| Paternal | Maternal | ||||
| Dennis | m1853bef | Nannie Andrews | |||
| b | d1858abt | b TN | d | ||
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| Children: James Davidson Dennis | |||||