Kacy
Meaning
“A modern respelling of Casey, from Irish O Cathasaigh, meaning vigilant or watchful.”
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Kacy peaked in the 1980s and the 2010s in nearly equal measure.
See popularity in Brazil
Popularity in Brazil
20 people · the #124,180 first name in Brazil · median age 30
Source: IBGE, Censo Demográfico 2022
When you meet Kacy
Most people given the name Kacy in the United States were born between 1980 and 2009. The Kacy you meet today is most often in her 20s or 30s.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Kacy deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Kacy truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Kacy fits with your family’s names and surname.
Keep exploring
Does Kacy fit YOUR family?
nametree reads your family’s names and finds the ones that belong. Free, private, no ads.
Add Kacy to your family’s tree →