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Vasilios

#5,375 in 2025Boys' name

Of the king, kingly, royal

Vasilios has been given to 1,500 babies in the U.S. since 1923. In 2025 it ranked #5,375 of 13,926 boys’ names in use. Its peak year was 1975, with 45 recorded.

Babies named Vasilios, 2025

1 in 184,000

Vasilios over time, 1880–2025

Boys
020406018801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Vasilios: meaning, origin, and history

Of the king, kingly, royal

Deeper origin not confirmed in the cited records

What Vasilios means

Vasilios means “of the king, kingly, royal”, associated with basíleios.

Dictionary etymologyReferences, data & attribution

From a transliteration of Modern Greek Βασίλειος (Vasíleios), a male given name used in (modern) Greece, which in turn derives from Ancient Greek Βασίλειος (Basíleios), from βασίλειος (basíleios, “of the king, kingly, royal”), from βασιλεύς (basileús, “king”). Doublet of Basil. See Basil for more details.

Excerpt from Wiktionary: Vasilios (English) · CC BY-SA 4.0

Wiktionary material is available under CC BY-SA 4.0.

Origin, language, and formation

Vasilios is used in English.

Vasilios comes through Greek Βασίλειος and Ancient Greek Βασίλειος.

Related names and everyday forms

Related names include Βασίλειος and Basil.

American usage and historical context

In the United States, 1,500 boys were recorded with the name Vasilios between 1923 and 2025. Its highest annual count was 45 in 1975; its best national rank was #1,301 in 1975.

Over 5 years its rank rose, from #6,263 in 2020 to #5,375 in 2025. Over 10 years its rank fell, from #4,166 in 2015 to #5,375 in 2025.

How common is Vasilios?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 184,000
18 of 3,315,165 births
Among boys only
1 in 94,900
<0.01% of boys
Rank, 2025
#5,375
of 13,926 boys’ names in use
Coin-flip room size
127,662 kids
Even odds of a second one

Where Vasilios sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 127,662 children born in 2025 and it's an even bet that one of them is another Vasilios. In a class of 30 the chance is Under 1%.

When Vasilioss were born

Half of everyone ever recorded as Vasilios was born before 1990 — so the typical Vasilios is around 35 today.

Median birth year
1990
About 35 years old
Biggest decade
1970s
21.0% of all use
Born in the last 25 years
33.4%
Spread across generations
Recorded since 1950
1,494
People you could plausibly meet
Choose a decade

1970s — 21.0% of all recorded uses (315).

Is Vasilios 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
+786
Places climbed
Rank vs 5 years ago
+888
Places climbed
Rank vs 10 years ago
−1,209
Places dropped
Births vs 10 years ago
0.72×
Fewer babies than then
Share of its own peak
40.0%
Peak was 1975 (45)
Years since peak
50
Years
Year-to-year steadiness
Shifting
18.7% average annual change
Best rank ever
#1,301
1975

Spellings of Vasilios

Vasilios is not the most common spelling — Basilio is, with 54.7% against Vasilios's 45.3%.

  • Basilio54.7%1,809
  • Vasilios45.3%1,500

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Where Vasilios is used

Across 1910–2025, Vasilios was most concentrated in New York — about 1 in 33,333 boys, against 1 in 89,022 across all states with data. It was least common in California (1 in —).

03 per 100,000

Most concentrated

  1. 1New York1 in 33,333
  2. 2Illinois1 in 100,000
  3. 3Massachusetts1 in 100,000
  4. 4New Jersey1 in 100,000
  5. 5California1 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. Vasilios has too little recent state data to map, so this covers all years from 1910.

Vasilios around the world

Where Vasilios ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • Canada
    1991–2023
    #3,103
    in 2023
  • South Australia
    1944–2012
    #771
    in 2012

Popularity data from Statistics Canada and Consumer and Business Services (South Australia). StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.

Vasilios by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
#5,375
Trend vs 5 yrs ago
Up 888
Best rank ever
#1,301
1975
Peak year
1975
45 that year
First recorded
1923
Last recorded
2025
All-time count
1,500
Count in 2025
18

Names similar to Vasilios

Matched on shared beginnings and endings, similar length, and comparable popularity.

GeorgiosAntoniosVashawnVashonVassiliosDimitriosDemetriosVashaunAthanasiosAnastasiosVascoVasiliAlexiosVasilijeVasileiosMakariosSteliosHeliosVasilisSotiriosJuandediosVashVasishtaVasiliy

Sibling names for Vasilios

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Vasilios

Top names of 1975, Vasilios's peak yearThe 1970s in fullOther names that peaked in 1975Boys' names starting with V