Katy
Meaning
variant of Katherine, traditionally pure
Katy around the world
One shared root links 26 names across 8 languages.
Shared root: from Greek Aikaterine, linked since early Christian times to katharos "pure", though the name's true origin predates that folk etymology
The constellation
18 more branches of this family
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Katy peaked in the 1970s and the 2020s in nearly equal measure.
See popularity in Brazil
Popularity in Brazil
1,235 people · the #7,175 first name in Brazil · about 1 in 166,667 · median age 35
Among people named Katy living in Brazil at the 2022 census, more were born in the 1980s than in any other decade.
The census also counted 22 born between 2020 and August 2022, too recent a span to chart.
Source: IBGE, Censo Demográfico 2022
When you meet Katy
Most people given the name Katy in the United States were born between 1970 and 1999. The Katy you meet today is most often in her 30s or 40s.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Katy deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Katy 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 Katy fits with your family’s names and surname.
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