First names of Pres. Wives: a. Jimmy Carter's wife b. Abe Lincoln's wife c. Lyndon Johnson's wife's real first name d. James Buchanan's wife

While some presidential spouses are household names, others are sources of great trivia. Rosalynn Carter, for instance, was a key political partner and advisor to her husband, Jimmy Carter, throughout his career. Across the centuries, Abraham Lincoln's wife, Mary Todd Lincoln, came from a wealthy, well-educated Kentucky family. Her life in the White House was marked by immense personal tragedy, including the death of her son Willie and the assassination of her husband.

The other names require a bit more digging. While the world knew her as "Lady Bird" Johnson, the wife of President Lyndon B. Johnson was born Claudia Alta Taylor. She earned her famous nickname as a small child when her nursemaid declared she was "as purty as a ladybird." The final answer is a unique piece of presidential history: James Buchanan was the only U.S. president to be a lifelong bachelor. Since he never married, there was no First Lady during his term. The role of official White House hostess was capably filled by his niece, Harriet Lane.