Neithan is a Spanish-influenced spelling of Nathan, the Hebrew name that means "he gave" or "gift", borne by the prophet who advised King David; the ei spelling mirrors how the English name sounds to Spanish speakers. It is one of the newest arrivals in the American rankings. Neithan ranked number 4659 in 2015, climbed sharply in the 2020s and entered the top 1000 for the first time in 2025 at number 723.