Respelling of Ethan, from Hebrew eitan, "firm" — firm; enduring. The spelling reflects the Hebrew vowel and is common in Latin American families.
Eithan ranks 97th among American boys in 2025, with 3,636 born that year. Its best year was 2025, when 3,636 babies were given the name, ranking 97th. The typical living American called Eithan is about 2 years old today. It is relatively most common in Wyoming, where it accounts for 0.37% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.