A large-scale historical analysis of World Cup participation has identified striking naming, birth-month and zodiac patterns among more than 9,000 players across 23 tournaments from 1930 to 2026, according to new research compiled by VegasInsider.com.
The study, which spans nearly a century of international football, found that certain demographic traits appear disproportionately among World Cup players, with “Carlos,” January birthdays, and Aquarius emerging as the most frequently recurring categories across their respective datasets.
The findings, drawn from more than 3,700 unique first names and full squad registration records, are being framed by analysts as a statistical reflection of football’s development systems, selection biases, and broader cultural naming conventions rather than any causal relationship.
Key findings from the dataset
- Most common first name: Carlos (78 players)
- Joint second: Luis and José (61 each)
- Fourth: David (51)
- Fifth: Mario (49)
- Most common birth month: January (920 players)
- Second: March (855)
- Third: February (844)
- Most common zodiac sign: Aquarius (874 players)
- Second: Pisces (869)
- Third: Capricorn (813)
- Highest-frequency combination identified: Carlos, born in January, Aquarius
The dominance of January-born players is consistent with what sports scientists describe as the relative age effect , where youth players born earlier in selection cut-off cycles gain physical and developmental advantages over younger peers in the same age group.
In many football development systems, eligibility cut-offs align with the calendar year, meaning January-born players are often among the oldest in their cohort during formative academy stages.
The dataset places January well ahead of all other months, with March and February completing the top three.
The prevalence of “Carlos,” “Luis,” and “José” aligns closely with historical participation trends from Latin American and Southern European footballing nations, which have consistently produced a significant share of World Cup squads.
Notable historical examples embedded in the dataset include:
- Carlos Alberto (Brazil, 1970 captain)
- Luis Suárez (Uruguay)
- José Nasazzi (Uruguay, 1930 winner)
- David Beckham (England)
- Mario Götze (Germany, 2014 final scorer)
Aquarius leads the zodiac distribution largely due to its overlap with late January and February births; the two strongest months in the dataset.
Pisces and Capricorn follow closely, reinforcing the statistical clustering of early-year birth dates within elite football participation pathways.
Prominent players cited in these categories include Cristiano Ronaldo and Neymar (Aquarius), Ivan Rakitić (Pisces), and Eden Hazard (Capricorn).
The platform has also introduced an interactive calculator allowing users to input a child’s name, birth month, and zodiac sign to generate an implied probability of future World Cup participation based on historical frequency distributions.
While presented as a consumer-facing engagement tool, the underlying model is explicitly descriptive, relying on historical incidence rather than predictive causal modelling.
The company says the tool is designed to visualise long-run demographic patterns in elite football participation.
Broken grid, massive market (5) Managing the risks in Nigeria’s electricity market