 After successfully completing his college course, J.J. initially married Mary Clark Mattocks on 12 July 1887 in Cleveland, Cuyahoga County, Ohio, at the bride's childhood home.Before settling into their described "Bonnie Brae" on the Hudson River at Spuyten Duyvil, J.J. and Mary visited her mother in Los Angeles, California to consolidate contiguous land for the completion of their estate on Palisade Avenue, New York City.In J.J.'s household, he afforded Irish servants, and he and Mary had four girls