Hello Jacob,
Thansk for your note and information. My grandfather's actual surname was Poe but he and some of the family certainly used 'De Poe' at different times. My grand-father grew up in northern California (Mount Shasta and later near Sacramento) and was familair with Indian stories so perhaps adopted this usage. We may never know, but their is a story that his step-mother was either an America Indian or Mexican - bit sadly there are no records i have been able to track. best wishes from Oz - Leon