I have as the parents of Isaac Forbes Bailey Forbes and Mary Rogers, both born about 1810. Isaac(b.about 1842) had a brother Nathaniel (b. about 1833).This family is listed in the 1850 Currituck County, NC census. Based on the 1850 censuses, I am using the best information I can find to state that Isaac was the Confederate soldier I have mentioned. Nathaniel is the only Forbes by that name I can find in this area for that time.
I wish I could be of more help but that is all I have for Isaac. I do have more Forbes information if it will be helpful.