When Gustav Adolph Ruof was born on 17 February 1870, in Winnenden, Rems-Murr-Kreis, Baden-Württemberg, Germany, his father, Johann David Ruof, was 26 and his mother, Christiana Katharina Fritz (Friz), was 28. He married Anna Maria Schäfer on 27 March 1901, in Neustadt, Waiblingen, Württemberg, Germany. They were the parents of at least 1 son. He died on 28 February 1949, in Neustadt, Waiblingen, Württemberg, Germany, at the age of 79.