 Daniel had a brother, Jacob Greathouse.According to Allan Eckert's "The Frontiersman," Jacob Greathouse was captured, tortured and killed by Indians in 1791 for participation in the Yellow Creek Massacre.However, other documentation demonstrates that Jacob Greathouse died in September 1777 with William Foreman-and that the Greathouse captured and tortured in 1791 on the Ohio river by Indians in revenge for the massacre was Jonathan Greathouse.