Duncan
Meaning
brown warrior
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Duncan has stayed rare in US records the whole time: no peak decade to name.
See popularity in Brazil
Popularity in Brazil
37 people · the #81,857 first name in Brazil · median age 36
Source: IBGE, Censo Demográfico 2022
When you meet Duncan
Most people given the name Duncan in the United States were born between 1970 and 2009. The Duncan you meet today is most often in his 20s or 30s.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Duncan deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Duncan 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 Duncan fits with your family’s names and surname.
Keep exploring
Does Duncan fit YOUR family?
nametree reads your family’s names and finds the ones that belong. Free, private, no ads.
Add Duncan to your family’s tree →