On March 29, 1812, Todd married Lucy Payne Washington, the youngest sister of Dolley Madison[2] and the widow of Major George Steptoe Washington, who was a nephew of President George Washington. It is believed to be the first wedding held in the White House.[3] Their three children were William J. Todd, Madisonia Todd, and James Madison Todd.
[2] Kleber, John E. (ed.) (1992). The Kentucky Encyclopedia, p. 888. The University Press of Kentucky. ISBN 0-8131-1772-0.
[3] http://www.whitehousehistory.org/whha_history/history_faqs-06.html