If you mean by 'unit names' the company names, they are:

Co A - Danville Blues
Co B - Danville Greys
Co C - Nottoway Rifle Guards
Co D - Prospect Rifle Grays aka Prospect Rifle Guards
Co E - Black Eagle Rifles
Co F - Farmville Guard
Co G - Nottoway Greys
Co H - Appomattox Greys
Co I - Spring Garden Blues
Co K - Charlotte Rifles