FOR REAL: Daisy was first used as a name in the 19th century along with the rise of other flowers used as names. The word "daisy" itself comes from Old English meaning "day's eye." In the 19th century, Daisy was sometimes used as a pet form of Margaret, because in French the daisy flower is called the marguerite (French form of Margaret). Daisy has some literary cachet, being the names of characters in F. Scott Fitzgerald's The Great Gatsby and Henry James' Daisy Miller. As a girls' name, it was popular throughout the Victorian and Edwardian eras. It began to decline in popularity among English speakers in the 1930s, but was picked up by Spanish-speakers in the USA, with whom it became super popular in the 1980s and 1990s. Its popularity is beginning to pick up again among English Speakers, following the 100-year cycle that girls' names often go through.