Finneas is a modern spelling of Phineas, the English form of the biblical Pinchas, a name of uncertain origin that is usually explained as Egyptian for "the Nubian" or "dark-skinned"; the Finn- spelling ties it to the popular Irish Finn. The name shot up after Finneas O'Connell, Billie Eilish's brother and producer, swept the Grammys in 2020. In the United States Finneas ranked number 3659 in 2019, jumped to number 1724 in 2020 and stands at number 1428 in 2025, its best rank yet.