Isac is a distinctive choice, ranked #3256 in 2025. Your child is likely to be the only Isac in their class.
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UK Rank 2025
#3256
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About the Name Isac
Isac is climbing rapidly up the charts, having climbed 464 places in just five years. Its best recorded rank was #1688 in 2011 — and current momentum suggests it could challenge that mark again. The name has been a regular feature in UK records since 2004.
Isac is rare in the UK, so your child is very likely to be the only Isac in their class.
⭐ Famous People Named Isac
Raul Isac — Raul Tyson Isac Dias Monteiro or Raul Isac is a footballer who plays as a defender.
Isac von Krusenstierna — Isac von Krusenstierna is a Swedish orienteering competitor who represents the club OK Kåre.
Isac Lidberg — Isac Alexi Sivert Lidberg is a Swedish professional footballer who plays as a forward for 2.
Biographical summaries are shortened from Wikipedia and are used under the CC BY-SA 4.0 licence; those summaries remain available under that same licence.
Frequently Asked Questions
Common questions about the name Isac
Unlikely. With around 6 UK babies named Isac per year, your child will almost certainly be the only Isac in their class, and possibly the only one in the whole school.
Isac is declining: down 574 places since 2020, to #3,256 in 2025. It peaked at #1,688 in 2011.
Isac is a distinctive choice sitting outside the mainstream UK top names. Parents choosing less common names often find their children appreciate the individuality as they grow up, rarely needing to add an initial to distinguish themselves.
Notable people named Isac include: Raul Isac, Isac von Krusenstierna and Isac Lidberg. Short summaries for each appear below.
Isac does not appear in the US top 1,000 baby names, making it a distinctively British choice — your child is unlikely to encounter American Isacs in the wild.
6
UK babies named Isac (2025)
< 1
Expected classmates with this name (class of 28)
~0.0
In a school of 600
↓ 574 places
Rank change (last 5 years)
🏫 Who else is in the room?
In a typical UK class of 28, highlighted children share the name Isac
Almost certainly the only Isac in the class
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UK Popularity (2004–2025)
Rank and birth count · ONS official data
No US data available for this name
✨ Similar names to Isac
Names with a similar style — each with their own classroom story