Castulo
Boys' nameMeaning not yet documented
Castulo has been given to 116 babies in the U.S. since 1914. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 1924, with 9 recorded.
Babies named Castulo, 2018
1 in 703,000
Castulo over time, 1880–2025
Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.
How common is Castulo?
Castulo had fewer than 5 recorded uses in 2025, so these figures use 2018, the last year it was published.
- Among all babies, 2018
- 1 in 703,000
- 5 of 3,516,853 births
- Among boys only
- 1 in 363,000
- <0.01% of boys
- Rank, 2018
- Unranked
- Fewer than 5 uses
- Coin-flip room size
- 487,541 kids
- Even odds of a second one
Where Castulo sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 2018 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 487,541 children born in 2018 and it's an even bet that one of them is another Castulo. In a class of 30 the chance is Under 1%.
When Castulos were born
Half of everyone ever recorded as Castulo was born before 1938 — so the typical Castulo is around 87 today.
- Biggest decade
- 1920s
- 37.1% of all use
- Born in the last 25 years
- 11.2%
- Spread across generations
- Recorded since 1950
- 34
- People you could plausibly meet
1920s — 37.1% of all recorded uses (43).
Is Castulo rising or falling?
Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.
- Rank vs 1 year ago
- —
- Not ranked then
- Rank vs 5 years ago
- New entry
- Not ranked then
- Rank vs 10 years ago
- —
- Not ranked then
- Births vs 10 years ago
- —
- Not published both years
- Share of its own peak
- 0%
- Peak was 1924 (9)
- Years since peak
- 101
- Years
- Year-to-year steadiness
- Volatile
- 29.7% average annual change
Where Castulo is used
Across 1910–2025, Castulo was most concentrated in Texas — about 1 in — boys, against 1 in 340,089 across all states with data.
Most concentrated
- 1Texas1 in —
Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Castulo has too little recent state data to map, so this covers all years from 1910.
Castulo by the numbers
The raw record for each sex the name is used for.
Names similar to Castulo
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Castulo
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.