Eilish
Meaning
“God is my oath (anglicized form of Eilís, Irish for Elizabeth)”
The story
Eilish is the anglicized spelling of Eilís, the Irish form of Elizabeth, God is my oath, pronounced EYE-lish, and until recently it lived quietly inside Ireland. Then the world's most famous Eilish turned out to be carrying it in the middle: Billie Eilish, whose parents chose the name after a documentary about the Irish twins Katie and Eilish Holton. The green-haired debut album era made the spelling globally recognizable almost overnight. It remains rare in US records since 1890, which gives it an unusual profile: instantly familiar to hear, almost never met in person. An Elizabeth in Irish dress, with the most famous middle name in pop. The pop association is immediate, while the older Irish lineage keeps the name from being merely celebrity-made.
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Eilish has stayed rare in US records the whole time: no peak decade to name.
When you meet Eilish
Most people given the name Eilish in the United States are teenagers or young adults today.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Eilish deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Eilish truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Eilish fits with your family’s names and surname.
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