 Rowan married Anne Lytle on October 29 , 1794 . She was the daughter of Captain William Lytle , one of the early settlers of Cincinnati , Ohio , and by this marriage Rowan became the uncle of Ohio congressman Robert Todd Lytle . Rowan and his wife – who he affectionately nicknamed " Nancy " – had nine children : Eliza Cooper ( Rowan ) Harney , Mary Jane ( Rowan ) Steele , William Lytle Rowan , <unk> Hill Rowan , John Rowan , Jr . , Josephine Daviess ( Rowan ) Clark , Ann ( Rowan ) Buchanan , Alice Douglass ( Rowan ) Shaw Wakefield , and Elizabeth ( Rowan ) Hughes . <unk> Hill Rowan served as an emissary to Spain for President Andrew Jackson . John Rowan , Jr. was appointed U.S. Chargé d 'Affaires to Naples by President James K. Polk , serving from 1848 to 1849 . Ann Rowan married Joseph Rodes Buchanan , a noted physician of Covington , Kentucky . 
