John Rush was living with Frederick and Isabel Rush in the 1870 US Census. He would have been born about 1876 in SC. Wife was Della.
John Rush
Head
United States Census, 1920
birth: 1876 South Carolina
residence: 1920 McMillen, Florence, South Carolina, United States
spouse: Della Rush
other: Earnest Cummings
John Rush
Head
United States Census, 1910
birth: 1876 South Carolina
residence: 1910 Mcmillan, Florence, South Carolina, United States
spouse: Della Rush