I have some relatives here in Austin, TX with the last name of Roberson. Like your family they too have different spellings of their last name. I'm not sure of who married who in order to get the surname of Roberson but I do know that they are the descendants of the Jacksons and the Colvins. The Jackson Family Reunion will take place later this month here in Austin and at that time they will provide us with the family history.

Pewee