Hebrew Yesha'yahu — the lord is salvation. The prophet whose book supplies much of the language of Handel's Messiah.
Isaiah ranks 57th among American boys in 2025, with 5,273 born that year. Its best year was 2006, when 10,483 babies were given the name, ranking 39th. The typical living American called Isaiah is about 18 years old today. It is relatively most common in Hawaii, where it accounts for 0.45% 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.