John Carroll was married to Catherine Burkett. Her dates are 1806-1885. John's sister, Mary, was married to a Hoover (John Hoover).
I have John Carroll as being born in Maryland in 1804, son of Charles Carroll and Magdalene unkn. I descend from John's brother, Jacob Carroll (1785-1841) You are correct that their father, Charles Carroll, was killed on the Carroll farm in Miami County, Ohio, 9 Oct 1836.