Hello,

There is a William Thompson in 1900 in Rhea County who is living with a white family as a servent. The age matches your William Thompson of 1910

Name: William Thompson
Home in 1900: Civil District 3, Rhea, Tennessee
Age: 18
Estimated birth year: 1882
Birthplace: Indiana (THIS IS MISPRINT BY ANCESTRY.COM. THE CENSUS INMAGE STATES HE WAS BORN TENNESSEE)
Race: Black
Relationship to head-of-house: Servant

Image source: Year: 1900; Census Place: Civil District 3, Rhea, Tennessee; Roll: T623 1593; Page: 3B; Enumeration District: 81.

Holloway, John Head White Male age 44 TN TN TN
Holloway, Laura Wife White Female age 33 TN TN TN
(There are several Holloway Children Listed Here)
Thompson, William B/M Born July 1881 age 18 TN TN TN Servant/Farm Laborer