The Blount County Tennessee Kellers were "originally" from Lancaster Co Pennsylvania and of German Descent.
CENSUS- 1900 Blount Co TN - 8th CD - ED 19 - June 6
83-72-72 KELLER, William, b Dec 1864, age 35, married 15 years, TN-VA-TN, gunsmith
84 , Julia, wife, Aug 1866, 32, borne 6, 6 living, TN-VA-TN
85 , Margaret E., dau, Sept 1886, 13, TN
86 , Lawson F., son, Dec 1887, 12, TN
87 , Beulah A., dau, Sept 1891, 8, TN
88 , Lillian M., dau, Apr 1893, 7, TN
89 , Phebe V., dau, Feb 1896, 4, TN
90 , James M., son, Dec 1898, 1, TN
William's parents are Samuel & Elizabeth Keller