I have found some Brinns if anyone is looking in Chowan Co.
in the 1850 Chowan Census
There is a Joseph 50 Patience 50 Sarah 26 Joseph 18 John16 (this is beleived to be John W) Stephen 12
The John, I beleive to be the John W. who married Judia Forehand in 1858.
The Joseph Sr.I beleived remarried around 1860, as there is a marriage bond for a Jospeph and a Sophia Newby, and on that he is listed as the son of Nathaniel and Mary Brinn, who were married in 1797!! So the dates seem to be falling into line.But of course don't have absolute certainty.