Eythan is a modern spelling of Ethan, the Hebrew name meaning "strong", "firm" or "enduring", borne by Ethan the Ezrahite, a wise man mentioned in the Book of Kings. The y-spelling is used in France and among Hispanic American families and has spread quickly in recent years. Eythan climbed from number 4437 in 2015 to number 1262 in 2024 and reaches number 1171 in 2025, its best rank so far.