My William George Antis had 6 siblings (that I know of):
1. Thomas Watson Antis b. 4/6/1875 m. Elizabeth Stevenson
2. Matthew Edward Antis b. 6/18/77 m. Mary ?
3. Elsie Viola Antis b. abt. 1879 d. abt. 1888
4. Lizzie M. Antis b. abt. 1882 d. abt. 1890
5. Bertha Antis b. abt. 1886 d. abt. 1926
6. Harvey Antis b. abt. 1890 d. abt. 1898

William's father (Watson Antis) had 4 siblings (that I know of):
1. William b. abt. 1849
2. Margaret b. abt. 1851
3. David b. abt. 1852
4. Maria b. abt. 1858