I have been in recent contact with a Carla who is researching Henry Cross b. 1833 GA who married Martha Patsy Parker b 1835 TX, 1st cousin to Cynthia Ann Parker, mother of Quanah Parker. Henry & Martha had John H.(Henry?) Cross and Susan Sarah Cross.
Henry Cross is the elusive brother of my gg-grandfather, William Stephen Cross b. 1831, GA. You find this family in Hardin Co TX 1860.
In an email, Carla sent: "...the Parker family genealogy Chart available at Ft Parker states Martha Patsy Parker as daughter of James W Parker, married to unknown Cross and unknown Crenshaw."
The unknown Cross is Henry.
And in another email: "Martha Patsy Parker is the d/o James William Parker & Martha Patsy Duty."
She is sending me more info and I will be posting it on the website. Don't know if you need this info or not but I saw that Cynthia Ann Parker was one of the names on the list at the link you included.