Elizabeth Brown (Brown) - Related to spouse?

Comment there says:
The John Brown who married his cousin Elizabeth Brown was not a son of Abraham Brown and Mary Tribble. Their son named John died in the 1730s, when the widow Mrs. Mary (Tribble) Brown asked the court to allow her to be the admin. of John’s estate. It strongly appears that the John Brown who married Elizabeth Brown was instead the known son of Abraham’s brother Henry Brown (married Keziah Jones). This family is DNA Group 10 at FTDNA Brown DNA Project.