Allison vs. Allyson: which name is older?
The average Allison is 31 and the average Allyson is 30, so Allison is the older name, by about 1 year.
Allison and Allyson sound alike, so the spelling is the clue: a Allison is more likely to have been born in the mid 1990s, and a Allyson in the late 1990s.
Allison
Allyson
When was each name popular?
Allison peaked first, in 1994 (in the mid 1990s). Allyson peaked in 1998, 4 years later.
Which name is more common?
There are about 310,000 Allisons and about 52,000 Allysons alive in the US, so there are about 6 times as many Allisons as Allysons.
Boys or girls?
Both are girls' names: over 99% of living Allisons and 100% of living Allysons are women.
Names the same age as Allison
Names the same age as Allyson
More comparisons: Alison vs. Allison
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Allison or Allyson: questions
Which is older, Allison or Allyson?
The average Allison is 31 and the average Allyson is 30, so Allison is the older name, by about 1 year.
How old is the average Allison?
The average Allison in the US is 31; half of all living Allisons are between 18 and 41.
How old is the average Allyson?
The average Allyson in the US is 30; half of all living Allysons are between 18 and 39.
Which is more common, Allison or Allyson?
There are about 310,000 Allisons and about 52,000 Allysons alive in the US, so there are about 6 times as many Allisons as Allysons.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). How we calculate this