Diane vs. Dianne: which name is older?
The average Diane is 68 and the average Dianne is 69, so Dianne is the older name, by about 1 year.
Diane and Dianne sound alike, so the spelling is the clue: a Dianne is more likely to have been born after World War II, and a Diane in the mid 1950s.
Diane
Dianne
When was each name popular?
Dianne peaked first, in 1947 (after World War II). Diane peaked in 1955, 8 years later.
Which name is more common?
There are about 390,000 Dianes and about 69,000 Diannes alive in the US, so there are about 6 times as many Dianes as Diannes.
Boys or girls?
Both are girls' names: over 99% of living Dianes and over 99% of living Diannes are women.
Names the same age as Diane
Names the same age as Dianne
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Diane or Dianne: questions
Which is older, Diane or Dianne?
The average Diane is 68 and the average Dianne is 69, so Dianne is the older name, by about 1 year.
How old is the average Diane?
The average Diane in the US is 68; half of all living Dianes are between 63 and 75.
How old is the average Dianne?
The average Dianne in the US is 69; half of all living Diannes are between 64 and 78.
Which is more common, Diane or Dianne?
There are about 390,000 Dianes and about 69,000 Diannes alive in the US, so there are about 6 times as many Dianes as Diannes.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). How we calculate this