Etymology and History Hilary is an English given name derived from the Latin hilaris, meaning "cheerful" or "merry," which itself comes from the Greek ἱλαρός (hilaros). The name traces back to the ancient Roman names Hilarius (masculine) and Hilaria (feminine). During the Middle Ages, Hilary was predominantly a masculine name in England, in part due to several saints bearing the name, such as Hilary of Poitiers (4th-century bishop and Doctor of the Church) and Pope Hilarius (died 468). In the early 20th century, Hilary saw a revival in Britain, but this time as a predominantly feminine name, likely influenced by the fashionable -y ending for girls' names. In the United States, the name—along with its variant Hillary—experienced a complex trajectory: it gained popularity in the mid-20th century but abruptly declined after 1992, when Hillary Clinton became First Lady, as the name became heavily politicized. Cultural Significance The most famous recent association of the name Hilary is with American actress Hilary Swank (born 1974), known for her Oscar-winning roles in Boys Don't Cry and Million Dollar Baby. Another notable bearer is Hilary Duff (born 1987), singer and star of the television series Lizzie McGuire. In Britain, the name was famously borne by the explorer Edmund Hillary (though his surname is unrelated to the given name Hilary). Distribution and Variants Origin: Latin, via Greek Meaning: Cheerful, merry Type: Unisex (now primarily feminine in English) Usage regions: English-speaking world Related forms: Variant Hillary; masculine forms Hilarius, Hilarion; Italian Ilario (m), Ilaria (f); Finnish Ilari; Russian Illarion Surname descendant: Ellery