The following Biographical sketch was copied from the book "HISTORY AND BIOGRAPHY COUNTIES OF WHITE AND PULASKI, INDIANA. Historical and Biographical. Illustrated. Chicago; F.A. Battey & Co., Publishers. 1883. page 761, Tippecanoe Township, Pulaski County, Indiana.
"ISAAC J. SLONAKER was born in Preble County, Ohio, December 5, 1840, and is one of nine children born to JACOB and MARGARET (MOORE) SLONAKER, the names of the living being ISAAC, LEVI and MARTHA. The father was born in Pennsylvania in 1805. He was a farmer, but worked sometimes at coopering. He came to this county in 1847, but in 1867, moved just across the line into Fulton County, where he still resides. ISAAC J. came here with his father, and has lived on his present place ever since. He has made farming the business of his life. In the fall of 1874, he was elected Township Trustee, which office he held for over five years. He was married, December 16, 1866, to MARTHA MAHLER, who has given birth to eleven children, five boys and six girls; the names of the living are ANNIE, MARY, ROSS, JAMES, MARTHA, PET, EVA, PLATON and BERT. MR. SLONAKER owns eighty acres of land in this township, and seventy-seven in Fulton County (thirty in timber); his residence is two and one-half miles southeast of Monterey."