Lyllian
Recorded 1923–2025 · United States
Lyllian was most popular in 2009, when 45 American babies were given the name — ranking #6,141 that year. In 2025 it ranked #24,763, with 5 births. Across 1880–2025 the Social Security Administration has recorded 635 people named Lyllian.
Lyllian over time
How old is the name Lyllian?
Lyllian first appears in Social Security Administration records in 1923, which makes it about 102 years old as a recorded American name. It has been recorded in 30 of the 103 years since.
How many people are named Lyllian?
The Social Security Administration has recorded 635 American births named Lyllian between 1880 and 2025. That is recorded US births, not a world population — it counts people issued a Social Security number at birth in the United States. Of those, roughly 618 are estimated to be alive today.
How many babies were named Lyllian in 2025?
5 American babies were named Lyllian in 2025, ranking #24,763 that year.
Is Lyllian getting more or less popular?
Lyllian is falling. Across 2021–2025 it averaged 9 births a year, against 39 a year across 2011–2015 — a change of -77% over the decade.
Measured on recorded births. American births overall have fallen since 2007, so most established names lose births over any recent decade — a name can shed births and still hold its rank. Compare the rank above, which is measured against the other names of the same year.
Is Lyllian a boy’s or a girl’s name?
Across the whole record Lyllian is a girl’s name — 100.0% of the 635 Americans given it were girls and 0.0% were boys. In births since 2016 it is 100% girls and 0% boys.
Counted from every US birth the Social Security Administration recorded under this name, so it reflects use rather than opinion. A name given to fewer than five babies of one sex in a year is withheld at source and is not counted.
How old is someone named Lyllian?
Roughly 618 Americans named Lyllian are alive today — 97% of everyone ever recorded with the name. The median is 15 years old, and half are between 12 and 20. That is a narrow band: Lyllian arrived and faded within about a decade rather than staying in steady use.
An estimate, not a count. Recorded births are carried forward through the Social Security Administration’s 2023 period life table, by age and sex. That table describes mortality in one recent year, so it credits the oldest cohorts with today’s survival rather than the harsher rates they actually lived through — the further back a name peaked, the more this will overstate how many remain. It counts people issued a Social Security number at birth, not immigrants who arrived later.
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See Lyllian on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org