Italian and Spanish form of Elizabeth, from Hebrew Elisheva — god is my oath. Isabella of Castile funded the 1492 voyage; the name has been royal in Spain, Portugal and England.
Isabella ranks 7th among American girls in 2025, with 10,666 born that year. Its best year was 2010, when 22,966 babies were given the name, ranking 1st. The typical living American called Isabella is about 15 years old today. It is relatively most common in Delaware, where it accounts for 0.67% 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.