Issac

A play on the spelling of Isaac that's somehow been in the Top 1000 every year since 1880. (If only by a hair: In both 1926 and 1962, it came in at number 999.) It hit an all-time peak at Number 377 in 2007, and has slumped a fair bit in the ensuing decade.

Issac is also given to girls.

Pronounced IZ-uck.

As of October 2026, Issac ranked #9458 for girls in US births in 1983 and #915 for boys in US births in 2025 SSA, peaked at #8518 for girls in 1976 and #376 for boys in 2008.