I sensed your pain earlier and am truly sorry! I don't think Beggs fathered your dad? There is a marriage record for W. R. Beggs to Maggie "Mahow"/"Mahew" on 24 Jan 1904 in Angelina County. That's two years prior to the birth of your father. FYI, there were eight kids born to Beggs/Maggie. Anyone with "first hand" knowledge of your father's birth would be more than age-100, if still living? Perhaps family lore was passed down to later generations? Also complicating your research is the "correct" surname of Charles Otho (that he didn't use) and you are aware of it. I failed to find descendants of Ben F. Glasscock/Elizabeth Katherine McKinney. Have no recommendation for you to proceed. Your situation defies traditional methods of family research.