Lilian vs. Lillian: which name is older?
The average Lilian is 19 and the average Lillian is 29, so Lillian is the older name, by about 11 years.
Lilian and Lillian sound alike, so the spelling is the clue: a Lillian is more likely to have been born in the early 1920s, and a Lilian in the late 2000s.
Lilian
Lillian
When was each name popular?
Lillian peaked first, in 1920 (in the early 1920s). Lilian peaked in 2007, 87 years later.
Which name is more common?
There are about 18,000 Lilians and about 200,000 Lillians alive in the US, so there are about 11 times as many Lillians as Lilians.
Boys or girls?
Both are girls' names: 100% of living Lilians and over 99% of living Lillians are women.
Names the same age as Lilian
Names the same age as Lillian
More comparisons: Lillian vs. Lily
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Lilian or Lillian: questions
Which is older, Lilian or Lillian?
The average Lilian is 19 and the average Lillian is 29, so Lillian is the older name, by about 11 years.
How old is the average Lilian?
The average Lilian in the US is 19; half of all living Lilians are between 10 and 24.
How old is the average Lillian?
The average Lillian in the US is 29; half of all living Lillians are between 11 and 41.
Which is more common, Lilian or Lillian?
There are about 18,000 Lilians and about 200,000 Lillians alive in the US, so there are about 11 times as many Lillians as Lilians.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). How we calculate this