Isaac vs. Issac: which name is older?
The average Isaac is 21 and the average Issac is 25, so Issac is the older name, by about 4 years.
Isaac and Issac sound alike, so the spelling is the clue: a Issac is more likely to have been born in the late 2000s, and a Isaac in the late 2000s.
Isaac
Issac
When was each name popular?
Isaac peaked first, in 2007 (in the late 2000s). Issac peaked in 2008, 1 year later.
Which name is more common?
There are about 300,000 Isaacs and about 22,000 Issacs alive in the US, so there are about 14 times as many Isaacs as Issacs.
Boys or girls?
Both are boys' names: over 99% of living Isaacs and over 99% of living Issacs are men.
Names the same age as Isaac
Names the same age as Issac
Think you can guess a Isaac's age?
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Isaac or Issac: questions
Which is older, Isaac or Issac?
The average Isaac is 21 and the average Issac is 25, so Issac is the older name, by about 4 years.
How old is the average Isaac?
The average Isaac in the US is 21; half of all living Isaacs are between 10 and 27.
How old is the average Issac?
The average Issac in the US is 25; half of all living Issacs are between 13 and 32.
Which is more common, Isaac or Issac?
There are about 300,000 Isaacs and about 22,000 Issacs alive in the US, so there are about 14 times as many Isaacs as Issacs.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). How we calculate this