Spellings
Isaiah or Izaiah?
In the US in 2025, 90% of babies in this name family were spelled Isaiah and 8% Izaiah. Same name, slightly different impression: here are the figures for each spelling.
Isaiah90% of the family5,267 born in 2025#57 among boys−31% since 2015Izaiah8% of the family439 born in 2025#635 among boys−17% since 2015Isiah2% of the family120 born in 2025#1,477 among boys−33% since 2015Isayah<1% of the family8 born in 2025#8,910 among boys−53% since 2015Isaïa<1% of the family7 born in 2025Isaya<1% of the family0 born in 2025
Ten years ago
Isaiah already led in 2015, with 91% of the family's births; it has 90% in 2025. All spellings together, the family went from 8,386 to 5,834 births (−30%).
| Spelling | 2015 | 2025 | Change |
|---|---|---|---|
| Isaiah | 7,658 | 5,267 | −31% |
| Izaiah | 532 | 439 | −17% |
| Isiah | 179 | 120 | −33% |
| Isayah | 17 | 8 | −53% |
How they sound
- Isaiah /aɪˈzeɪə/ (eye-ZAY-uh)
- Izaiah /aɪˈzeɪə/ (eye-ZAY-uh)
- Isiah /aɪˈzeɪə/ (eye-ZAY-uh)
- Isayah /aɪˈzeɪə/ (eye-ZAY-uh)
- Isaïa /izaˈja/ (ee-za-YA)
- Isaya /i.za.ˈja/ (ee-zah-YAH)
In France
In France in 2025: Isaiah 335 births (#170 among boys), Izaiah 10 births, Isiah 5 births, Isayah 70 births (#600 among boys), Isaïa 80 births (#538 among boys) and Isaya 30 births.
Sources: Social Security Administration (SSA), Insee (France), 2025 data. How we calculate these figures.
Which spelling is yours?
The one-minute style quiz.