Kieran is a moderately popular boys' name in United States, ranking #493 in 2019 with 581 recorded births. The name reached its all-time peak in 2025 with 817 births ranking #389. Since 1996, the popularity has increased by 109.0%. In 2019, approximately 1 in every 3,087 boys born was named Kieran. RISING Recent data shows the name is currently rising.
Kieran is an Irish name usually explained as "little dark one". It has a graceful, well-balanced sound and remains one of the most approachable Celtic classics.
The name has saintly and historical roots in Ireland and later spread widely through the English-speaking world. Its appeal comes from sounding distinctly Irish without being difficult or unfamiliar.