Your great-great-grandfather William Wilson Forbes is also the great-great-great-great-grandfather of Britney Spears. (Not that it's important or anything. It just that I'm tracking her family tree down.) Which makes you and Britney Spears' paternal grandmother, Emma Jean Forbes, third cousins. So here's William Forbes the first.
WILLIAM FORBES was born Abt. 1756 in VA, and died 07 Nov 1820 in Pendleton Dist, SC1. He married (2) MARGARET WARNOCK Abt. 1786 in SC. She died 27 Jun 1840 in Anderson Co, SC.
Notes for WILLIAM FORBES:
On 26 June 1775 William enlisted in the 3rd Regiment (SC) under Capt. John Caldwell; he was discharged in 1776 for medical reasons. He later joined the militia under Capt. Francis Logan and Col Pikcens, was on an expedition against the Indians. His obituary calls him "an old and faithful soldier during the Revolutionary War and one of the first settlers in this district." He is listed in the 1800 Census in Pendleton District: 20101-112100-00. This listing adds that he may be a member of the Forbus family that went from Amherst County VA to Jackson Co GA, travelling through SC. Talullah Jackson says he was Scots-Irish and came to America as a small boy. (The Revolutionary record says he was b in VA, PENDLETON CENSUS says "the ancestors of these people originally came from Scotland by way of Northern Ireland." William & Margaret Forbes sold 270 acres on both sides of Rocky River on 28 May 1801. Witnesses were Andrew Warnock & Michael Warnock. Michael also made oath. The same day Margaret released her dower rights.
Oh yeah and it's Rebecca Irvin Jones. Irvin as middle name. Jones as maiden name.
William Forbes Jr.'s first marriage was to Emily Zippora Norton who gave birth to Nelson Columbus Forbes, Britney's great-great-great-grandfather.