Where'd it come from? The "Lady Bird" in Lady Bird Johnson

Lady Bird Johnson was born on December 22, 1912 as Claudia Alta Taylor. Her African-American nurse, Alice Tittle, once remarked that she was as "purty as a ladybird." A ladybird is a what is commonly known as a ladybug, a member of the beetle family. And the nickname virtually replaced her name for the rest of her life. She married Lyndon B. Johnson on November 17, 1934.