Hello. I dont know if you will receive this message. I know that your post is quite old but I may be related. I have just posted a query of my own.
My great grandfathers name is Nathan and my grandfathers name was John. My mother was born in Texas in 1953, only child of my grandmothers but she suspected other children may exsist.
I know that she told me that Nathan was a student at the University of Kansas, which is 30 miles from where I live now. He was also the founder of Philips Oil?
If this means anything I would love to chat. It would be great to find family. Thanks