8th Regiment, Virginia Infantry (Confederate)
8th Infantry Regiment was organized at Leesburg, Virginia, in May, 1861. Its members were recruited in the counties of Loudoun, Prince William, and Fairfax. The unit was also called "Old Bloody Eighth" and from time to time "The Berkeley Regiment".
Only 1 surgeon and 11 privates surrendered on April 9, 1865. The field officers were Colonels Norborne Berkeley and Eppa Hunton, Lieutenant Colonels Edmund Berkeley and Charles B. Tebbs, and Majors William N. Berkeley and James Thrift. 
Companies in this Regiment with the Counties of Origin
Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first.
Company A (Hillsboro Border Guards) - many men from Loudoun County
Company B (Piedmont Rifles) - many men from Fauquier County
Company C (Evergreen Guards) - many men from Prince William County
Company D (Champe Rifles) - many men from Loudoun County
Company E (Hampton's Company) -many men from Loudoun County
Company F (Blue Mountain Boys) - many men from Loudoun County
Company G (Thrift's Company) - many men from Fairfax County
Company H (Potomac Grays) - many men from Loudoun County
Company I (Simpson's Company - many men from Loudoun County
Company K (Scott's Company) - many men from Fauquier County
The information above is from 8th Virginia Infantry by John E. Divine.
- Divine, John E. 8th Virginia Infantry. Lynchburg, Va.: H.E. Howard, 1983. FHL Book 975.5 M2vr v. 6.
- National Park Service, The Civil War Soldiers and Sailors System, (accessed 6 December 2010).