Babies named Luna (US)

Between 2005 and 2022, the number of countries with legal same-sex marriage grew from around five to over thirty, and the number of babies named Luna in the United States grew from a small cohort to a name that ranked in the top ten. The correlation is 0.97 across 18 years. Whether Lunas are disproportionately born in years of legal progress, or whether legal progress disproportionately encourages Luna-naming, or whether both are simply things that increased during a period of social liberalization, the data declines to specify. The Lunas themselves are not available for comment.

Both trends track the same global arc of social liberalization over the 2005-2022 period. Same-sex marriage legalization expanded from the Netherlands and a few others in the early 2000s to 35+ countries by 2022, with the pace accelerating through the 2010s. The name Luna rose from outside the US top 500 in the early 2000s to a top-10 name by 2022, driven by progressive parenting communities, Harry Potter's cultural reach, and aesthetic preferences strongly correlated with urban, educated, liberal demographics — the same demographic that was also most engaged with marriage equality advocacy. Both are signals from the same cultural cohort at the same moment.

Cultural change rarely travels alone. When a society is moving in a particular direction, it does so across naming conventions, legal frameworks, and consumer choices simultaneously, leaving a dense network of correlations that all point to the same underlying shift.