Callum vs Issac

Callum and Issaccompared 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.

Republic of Ireland · Boys
In 2025, Callum was ranked #49 and Issac #829 among boys in Republic of Ireland.
Northern Ireland · Boys
In 2024, Callum was ranked #54 and Issac #404 among boys in Northern Ireland.
Scotland · Boys
In 2024, Callum was ranked #62 and Issac #619 among boys in Scotland.
England and Wales · Boys
In 2024, Callum was ranked #248 and Issac #560 among boys in England and Wales.

Callum and Issac over time

Callum and Issac appear together in 2 published lists, across 42 years of shared records. Callum held the stronger position in more years in 2 of them, Issac in 0.

In none of those lists did their order change and stay changed.

Each reached its own highest recorded position first in 1 of the lists they share.

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.

List by list

England and Wales · Boys29 shared years, 1996–2024
Callum held the stronger position in 29 of those years, Issac in 0.
Highest recorded here: Callum #8 in 1998, Issac #382 in 2019.
The order between them never changed and held in this list.
Most recent shared year, 2024: Callum #248, Issac #560.
Republic of Ireland · Boys13 shared years, 1998–2025
Callum held the stronger position in 13 of those years, Issac in 0.
Highest recorded here: Callum #29 in 2009, Issac #324 in 1998.
The order between them never changed and held in this list.
Most recent shared year, 2025: Callum #49, Issac #829.

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.

Where to go next

Comparisons that share a name, a rule or a published list with this one. Each is an existing comparison page with its own evidence — nothing here says these pairs are alike.

Other comparisons involving Callum

Pairs where Callum shares a published list with another name, each measured inside one registrar's own list.

Callum vs Ross
In 1997 they stood at #34 and #30 in Northern Ireland · Boys, 4 places apart; by 2023 they were #98 and #395.
Callum · Ross · 27 shared years, 1997–2023 · Started together, ended far apart
See the 2023 Northern Ireland ranking
Sean vs Callum
Sean and Callum changed places 12 times in Northern Ireland · Boys between 1997 and 2024, ending at #48 and #54.
Sean · Callum · 28 shared years, 1997–2024 · Repeatedly exchanged positions
See the 2024 Northern Ireland ranking
Jack vs Callum
Both reached their highest recorded position in England and Wales · Boys within 2 years — Jack #1 in 1996, Callum #8 in 1998.
Jack · Callum · 29 shared years, 1996–2024 · Peaked in the same years
See the 1998 England and Wales ranking
Michael vs Callum
In 1988, Michael moved ahead of Callum in New Zealand · Boys — #100 and #80 the year before became #2 and #80.
Michael · Callum · 22 shared years, 1988–2009 · One moved ahead of the other
See the 1988 New Zealand ranking

Side by side

Side-by-side comparison of Callum, Issac
Field	Callum	Issac
Record type	Editorially researched profile	Official statistical record (evidence-only)
Gender usage	male	male
Meaning	Traditionally associated with 'dove', via its connection to Saint Columba.	Not yet recorded
Origin	Scottish Gaelic (Anglicised form of Calum), from Latin columba	Not yet recorded
Pronunciation	/ˈkæləm/	Not yet recorded
Syllables	2	2
Common variants / nicknames	Not yet recorded	Not yet recorded
Recorded regional usage	AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ	GB-ENW, GB-NIR, GB-SCT, IE
Most recent popularity observation	Republic of Ireland · Boys #49 (2025)	Republic of Ireland · Boys #829 (2025)
Pronunciation clarity (demonstration score)	90/100	Not yet recorded
Spelling simplicity (demonstration score)	88/100	94/100
International familiarity (demonstration score)	100/100	100/100
Data Confidence	medium	medium

What the data shows

Callum has a recorded origin (Scottish Gaelic (Anglicised form of Calum), from Latin columba); Issac does not have one recorded yet.
Callum and Issac both have 2 syllables.
A meaning is recorded for Callum; Issac doesn't have one written yet.
Both names have recorded usage in GB-ENW, GB-NIR, GB-SCT, IE.

How each name got here

Callum

Popularity journey

First recorded1988
First recorded at #80 among boys in New Zealand in 1988 — the earliest year that source publishes this name, not necessarily the earliest it was used.
New Zealand · Boys
Highest recorded1996–2024
Highest recorded position: #8 among boys in England and Wales, in 1998 (recorded 1996–2024).
England and Wales · Boys
Most recent2025
Most recently recorded at #49 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys

Issac

Popularity journey

First recorded1996
First recorded at #898 among boys in England and Wales in 1996 — the earliest year that source publishes this name, not necessarily the earliest it was used.
England and Wales · Boys
Highest recorded1998–2025
Highest recorded position: #324 among boys in Republic of Ireland, in 1998 (recorded 1998–2025).
Republic of Ireland · Boys
Most recent2025
Most recently recorded at #829 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys