June -  from L. Junius (mensis), probably a variant of Junonius, "sacred to Juno" Roman goddess of women and marriage, perhaps lit. "the young one" (perhaps as goddess of the new moon), from an Italic root akin to L. junior "younger," juvenis "young". Replaced O.E. liðe se ærra "earlier mildness." Junebug, name for various beetles which appear in June, first attested 1829 in Southern U.S. dialect.