Eydan is a modern spelling that merges two names: Aidan, from the Irish Aodhán, "little fire", and the Hebrew Eitan, "strong" or "enduring". It is used mainly in Latino families as a phonetic spelling. Eydan rose fast in the United States, from number 6446 in 2015 to number 1105 in 2023, and ranks number 1670 in 2025 with 99 boys.