Girl Name · English Origin
Casi
Last reviewed: June 2026
Casi is a girl baby name of English origin, meaning "Strong-willed". It currently sits in the Rare tier of US baby names for 2026, and parents who love Casi often also consider Cassi.
Names like Casi
Frequently asked about Casi
What does the name Casi mean?
Casi means "Strong-willed" and is of English origin.
What is the origin of Casi?
Casi originates in English naming tradition.
How do you pronounce Casi?
Casi has 4 letters and is most commonly stressed on the first syllable.
Is Casi a boy's or girl's name?
Casi is primarily used as a girl's name in US records.
How popular is Casi in 2026?
In our 2026 popularity tracker, Casi sits in the Rare tier — an uncommon, standout choice.
What names are similar to Casi?
Names that share Casi's sound and style include Cassi, Case, Cash, Casey, Casie.