Dean vs Leo
Dean and Leocompared 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.
England and Wales · Boys
In 2024, Dean was ranked #651 and Leo #5 among boys in England and Wales.
Scotland · Boys
In 2024, Dean was ranked #727 and Leo #5 among boys in Scotland.
Northern Ireland · Boys
In 2023, Dean was ranked #348 and Leo #6 among boys in Northern Ireland.
Republic of Ireland · Boys
In 2025, Dean was ranked #432 and Leo #10 among boys in Republic of Ireland.
Dean and Leo over time
Dean and Leo appear together in 3 published lists, across 113 years of shared records. Leo held the stronger position in more years in 2 of them, Dean in 1.
The order between them changed and held in 2 of those lists — a change in that published list, never a claim that one name displaced the other.
Dean reached its own highest recorded position earlier in 3 of those lists, and Leo 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 moved ahead of the other
In 2001, Leo moved ahead of Dean in England and Wales · Boys — #129 and #142 the year before became #140 and #101.
- Repeatedly exchanged positions
Dean and Leo changed places 4 times in Republic of Ireland · Boys between 1966 and 2025, ending at #432 and #10.
- Mirrored each other
Over 60 shared years in Republic of Ireland · Boys, Leo rose about as far as Dean fell — from #229 and #97 in 1966 to #432 and #10 in 2025.
- Longest-running competitions
Dean and Leo were both ranked in Republic of Ireland · Boys for 60 years, from 1966 to 2025, ending at #432 and #10.
List by list
Republic of Ireland · Boys60 shared years, 1966–2025
Dean held the stronger position in 32 of those years, Leo in 28.
Highest recorded here: Dean #24 in 1993, Leo #10 in 2025.
The order between them never changed and held in this list.
Most recent shared year, 2025: Dean #432, Leo #10.
England and Wales · Boys29 shared years, 1996–2024
Dean held the stronger position in 5 of those years, Leo in 24.
Highest recorded here: Dean #80 in 1996, Leo #5 in 2022.
The order changed in 2001: Leo moved ahead. In 2000 they stood at #129 and #142; by 2001 that had become #140 and #101.
Most recent shared year, 2024: Dean #651, Leo #5.
Northern Ireland · Boys24 shared years, 1997–2023
Dean held the stronger position in 8 of those years, Leo in 16.
Highest recorded here: Dean #45 in 1997, Leo #6 in 2023.
The order changed in 2005: Leo moved ahead. In 2004 they stood at #112 and #117; by 2005 that had become #113 and #83.
Most recent shared year, 2023: Dean #348, Leo #6.
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 | Dean | Leo |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | male | male |
| Meaning | Not yet recorded | Lion. |
| Origin | Not yet recorded | Latin |
| Pronunciation | /ˈliːoʊ/ | |
| Syllables | 1 | 1 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ |
| Most recent popularity observation | Republic of Ireland · Boys #432 (2025) | New South Wales, Australia · Boys #5 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 95/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Leo has a recorded origin (Latin); Dean does not have one recorded yet.
- Dean and Leo both have 1 syllable.
- A meaning is recorded for Leo; Dean doesn't have one written yet.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NZ.
How each name got here
Dean
Popularity journey
First recorded1956
First recorded at #95 among boys in New Zealand in 1956 — the earliest year that source publishes this name, not necessarily the earliest it was used.
New Zealand · Boys
Highest recorded1956–1991
Highest recorded position: #13 among boys in New Zealand, in 1967 (recorded 1956–1991).
New Zealand · Boys
Most recent2025
Most recently recorded at #432 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys
Leo
Popularity journey
First recorded1947
First recorded at #303 among boys in Norway in 1947 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded2009–2025
Highest recorded position: #3 among boys in New South Wales, Australia, in 2022 (recorded 2009–2025).
New South Wales, Australia · Boys
Most recent2025
Most recently recorded at #5 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys