Hi,

there is a John Weaver in VA listed as mulatto - with a son Walter, who might fit the family you are looking for:

Name: John Weaver
Estimated birth year: abt 1835
Age in 1870: 35
Birthplace: Virginia
Home in 1870: White Chapel, Lancaster, Virginia

Race: Mulatto
Gender: Male

Post Office: Lancaster

Here are his wive and children:
Name: Anna Weaver
Estimated birth year: abt 1840
Age in 1870: 30
Birthplace: Virginia
Home in 1870: White Chapel, Lancaster, Virginia
Race: Black
Gender: Female
Value of real estate: View image
Post Office: Lancaster

John R Weaver White Chapel, Lancaster, VA abt 1853 Virginia Mulatto Male
Sally Weaver White Chapel, Lancaster, VA abt 1855 Virginia Mulatto Female
Walter Weaver White Chapel, Lancaster, VA abt 1857 Virginia Mulatto Male
Ivy Weaver White Chapel, Lancaster, VA abt 1861 Virginia Mulatto Male

I do not see this family listed in 1860 census - which may indicate that they were not FPOC.

Denise