Duncan vs Lucas
How Duncan and Lucas compare across 146 years of US Social Security Administration baby-name records — popularity history, peak years, current rank, and which name overtook which.
US Popularity History — Side-by-Side
Annual US births named Duncan (boys) vs Lucas (boys), from US Social Security Administration national records.
Source: US Social Security Administration. Names appearing fewer than 5 times per year are suppressed by SSA.
Quick Stats
| Metric | Duncan | Lucas |
|---|---|---|
| Peak year (most US births) | 2000 — 530 boys | 2017 — 13,029 boys |
| Peak rank | #447 | #11 |
| Most recent rank (2023) | #930 (244 births) | #10 (10,219 births) |
| Total US births since 1880 | 7,160 | 290,284 |
| Last 10 years (2014–2023) | 2,066 | 116,799 |
Peak comparison takeaway
At its all-time peak, Lucas reached 13,029 US births in 2017 — 12,499 more than Duncan's peak count.
Strongest States — Last 10 Years
States where each name ranked highest, from SSA's state-level dataset. Lower average rank = name appears closer to the top of that state's boys-name list.
Duncan — top 5 states
Lucas — top 5 states
| # | State | Avg rank | Births |
|---|---|---|---|
| 1 | Florida | #3 | 8,933 |
| 2 | New York | #4 | 8,253 |
| 3 | New Jersey | #4 | 3,983 |
| 4 | Maryland | #6 | 2,113 |
| 5 | Connecticut | #6 | 1,403 |
Want a different comparison?
Data & methodology
Source: US Social Security Administration national baby names dataset 1880–2025 (CC0 public domain). Names with fewer than 5 occurrences in a given year are suppressed by SSA. State-level coverage runs 1910–2025. Crossover detection compares annual birth counts (not ranks) for each year both names appear. Methodology: see full notes. More comparisons →