Willie M. is located next to Church Austin and his wives, Polly and Julia. Very faint lettering on the stone suggests that he may be the son of Church and Julia. I have found no substantial evidence to support this.
A researcher for the Austin family has this: SAMUEL CHURCH AUSTIN (John2, Silas1), was born at New York in about 1838. He died at Milan, Michigan, 7 March 1907. He married first at Ridgeway, Lenawee County, Michigan, before 1868, POLLY BOWEN, born at Middlefield, Otsego County, New York, on 1 April 1838, the daughter of Henry and Arminda (Coonrod) Bowen. She died on 1 April 1878. He married second at Dundee, Monroe County, Michigan, after 1878, JULIA RANKIN. He married third at Castleton, Barry County, Michigan, on 11 September 1890, HESTER C. WALLACE. Samuel Church Austin was living at the Village of Milan, Michigan at the time of his death in 1907. Children of Samuel Church and Polly (Bowen) Austin: 48 i SILAS B. AUSTIN, b. 1868. 49 ii CLARA M. AUSTIN, b. 1873.