Origin and history of June

Roman goddess of adult women and marriage, sister and wife of Jupiter, mid-14c., probably literally "the young one" (if so, perhaps as goddess of the new moon), from Proto-Italic *juwen- "young," which also is the source of Latin iunior "younger," iuvenis "young man" (see young (adj.)). Noted for her stately beauty and fits of jealous rage. Also the patron of national finances. Usually identified with Greek Hera, but Juno also had qualities of Athena.

also junebug, 1829, a popular name for various beetles which emerge in adult form and are active in June, from June + bug (n.). The earliest uses are Southern U.S.; in the north it is used of a different beetle (but from similar large white grubs).