Isaac vs Sean
Isaac and Seancompared on official birth-registration statistics and Namewise's recorded data. This page states what each name's record shows — it never picks a winner or scores one name against the other.
Head to head
Ranks are only compared within one published list and one year. Two ranks from different years, from a boys' and a girls' list, or from different registrars are not comparable, so they are not placed side by side.
New South Wales, Australia · Boys
In 2007, Isaac was ranked #25 and Sean #85 among boys in New South Wales, Australia.
Northern Ireland · Boys
In 2024, Isaac was ranked #26 and Sean #48 among boys in Northern Ireland.
England and Wales · Boys
In 2024, Isaac was ranked #37 and Sean #638 among boys in England and Wales.
New Zealand · Boys
In 2007, Isaac was ranked #37 and Sean #83 among boys in New Zealand.
Scotland · Boys
In 2024, Isaac was ranked #49 and Sean #234 among boys in Scotland.
Republic of Ireland · Boys
In 2025, Isaac was ranked #104 and Sean #141 among boys in Republic of Ireland.
Norway · Boys
In 2022, Isaac was ranked #259 and Sean #496 among boys in Norway.
Isaac and Sean over time
Isaac and Sean appear together in 6 published lists, across 171 years of shared records. Sean held the stronger position in more years in 4 of them, Isaac in 2.
The order between them changed and held in 5 of those lists — a change in that published list, never a claim that one name displaced the other.
Sean reached its own highest recorded position earlier in 6 of those lists, and Isaac in none. Each position is a place inside its own list, so this compares when they peaked and never how high.
Counted list by list. Two names in the same published list are measured on the same scale in the same year, so those comparisons are real — but positions from different lists are not, so nothing here is combined into an overall standing.
How this pair is related
The relationship kinds these two qualify for, each under its own stated rule. Every one is drawn from a list they both appear in.
- One took the other's place near the top
In New Zealand · Boys, Isaac moved into the top 50 at #31 in 2000 as Sean fell out of it to #52, having been #31 the year before.
- One moved ahead of the other
In 2002, Isaac moved ahead of Sean in England and Wales · Boys — #75 and #67 the year before became #63 and #74.
- Closest over the longest run
Across 26 shared years in New Zealand · Boys, Isaac and Sean averaged 24.2 places apart, ending at #37 and #83.
- Longest-running competitions
Isaac and Sean were both ranked in Norway · Boys for 34 years, from 1979 to 2022, ending at #259 and #496.
List by list
Republic of Ireland · Boys38 shared years, 1964–2025
Isaac held the stronger position in 7 of those years, Sean in 31.
Highest recorded here: Isaac #77 in 2014, Sean #1 in 1997.
The order changed in 2019: Isaac moved ahead. In 2018 they stood at #98 and #74; by 2019 that had become #89 and #108.
Most recent shared year, 2025: Isaac #104, Sean #141.
Norway · Boys34 shared years, 1979–2022
Isaac held the stronger position in 11 of those years, Sean in 23.
Highest recorded here: Isaac #164 in 2014, Sean #185 in 2007.
The order between them never changed and held in this list.
Most recent shared year, 2022: Isaac #259, Sean #496.
England and Wales · Boys29 shared years, 1996–2024
Isaac held the stronger position in 23 of those years, Sean in 6.
Highest recorded here: Isaac #20 in 2015, Sean #49 in 1996.
The order changed in 2002: Isaac moved ahead. In 2001 they stood at #75 and #67; by 2002 that had become #63 and #74.
Most recent shared year, 2024: Isaac #37, Sean #638.
Northern Ireland · Boys28 shared years, 1997–2024
Isaac held the stronger position in 9 of those years, Sean in 19.
Highest recorded here: Isaac #20 in 2020, Sean #13 in 2001.
The order changed in 2016: Isaac moved ahead. In 2015 they stood at #42 and #40; by 2016 that had become #25 and #32.
Most recent shared year, 2024: Isaac #26, Sean #48.
New Zealand · Boys26 shared years, 1981–2007
Isaac held the stronger position in 8 of those years, Sean in 18.
Highest recorded here: Isaac #28 in 2004, Sean #28 in 1995.
The order changed in 2000: Isaac moved ahead. In 1999 they stood at #39 and #31; by 2000 that had become #31 and #52.
Most recent shared year, 2007: Isaac #37, Sean #83.
New South Wales, Australia · Boys16 shared years, 1990–2007
Isaac held the stronger position in 9 of those years, Sean in 7.
Highest recorded here: Isaac #25 in 2007, Sean #42 in 1990.
The order changed in 1998: Isaac moved ahead. In 1997 they stood at #57 and #52; by 1998 that had become #45 and #54.
Most recent shared year, 2007: Isaac #25, Sean #85.
Two names moving past each other in a ranking is a fact about the ranking. Namewise does not claim one name displaced the other, that families chose between them, or that either influenced the other — none of that is in this data.
Side by side
| Field | Isaac | Sean |
|---|---|---|
| Record type | Editorially researched profile | Editorially researched profile |
| Gender usage | male | male |
| Meaning | Traditionally understood as 'he will laugh' or 'he laughs', tied to the biblical narrative in which Abraham and Sarah laugh at the prophecy of Isaac's birth in their old age. | The Irish form of John, ultimately carrying the meaning 'Yahweh is gracious' via its Hebrew ancestry. |
| Origin | Biblical Hebrew, transmitted into English via Greek Isaak and Late Latin Isaac | Irish, Anglicised form of Sean, via Hebrew John |
| Pronunciation | /ˈaɪzək/ | /ʃɔːn/ |
| Syllables | 2 | 1 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ |
| Most recent popularity observation | New South Wales, Australia · Boys #26 (2025) | Republic of Ireland · Boys #141 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | 90/100 |
| Spelling simplicity (demonstration score) | 94/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Isaac is recorded with a Biblical Hebrew, transmitted into English via Greek Isaak and Late Latin Isaac origin, while Sean is recorded with a Irish, Anglicised form of Sean, via Hebrew John origin.
- Isaac has 2 syllables, compared with 1 for Sean.
- Isaac's recorded meaning differs from Sean's — see the table above for each.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ.
How each name got here
Isaac
Popularity journey
First recorded1964
First recorded at #232 among boys in Republic of Ireland in 1964 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Boys
Highest recorded1990–2025
Highest recorded position: #8 among boys in New South Wales, Australia, in 2015 (recorded 1990–2025).
New South Wales, Australia · Boys
Most recent2025
Most recently recorded at #26 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys
Sean
Popularity journey
First recorded1963
First recorded at #82 among boys in New South Wales, Australia in 1963 — the earliest year that source publishes this name, not necessarily the earliest it was used.
New South Wales, Australia · Boys
Highest recorded1964–2025
Highest recorded position: #1 among boys in Republic of Ireland, in 1997 (recorded 1964–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #141 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys