Leo vs Tiernan
Leo and Tiernancompared 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, Leo was ranked #5 and Tiernan #2921 among boys in England and Wales.
Scotland · Boys
In 2024, Leo was ranked #5 and Tiernan #619 among boys in Scotland.
Republic of Ireland · Boys
In 2025, Leo was ranked #10 and Tiernan #115 among boys in Republic of Ireland.
Northern Ireland · Boys
In 2024, Leo was ranked #12 and Tiernan #125 among boys in Northern Ireland.
Leo and Tiernan over time
Leo and Tiernan appear together in 3 published lists, across 112 years of shared records. Leo held the stronger position in more years in 2 of them, Tiernan in 0.
The order between them changed and held in one of those lists — a change in that published list, never a claim that one name displaced the other.
Tiernan 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 2011, Leo moved ahead of Tiernan in Northern Ireland · Boys — #101 and #68 the year before became #56 and #88.
- Repeatedly exchanged positions
Leo and Tiernan changed places 6 times in Republic of Ireland · Boys between 1964 and 2025, ending at #10 and #115.
- Mirrored each other
Over 29 shared years in England and Wales · Boys, Leo rose about as far as Tiernan fell — from #210 and #1235 in 1996 to #5 and #2921 in 2024.
- Longest-running competitions
Leo and Tiernan were both ranked in Republic of Ireland · Boys for 55 years, from 1964 to 2025, ending at #10 and #115.
List by list
Republic of Ireland · Boys55 shared years, 1964–2025
Leo held the stronger position in 49 of those years, Tiernan in 6.
Highest recorded here: Leo #10 in 2025, Tiernan #84 in 2022.
The order between them never changed and held in this list.
Most recent shared year, 2025: Leo #10, Tiernan #115.
England and Wales · Boys29 shared years, 1996–2024
Leo held the stronger position in 29 of those years, Tiernan in 0.
Highest recorded here: Leo #5 in 2022, Tiernan #697 in 1999.
The order between them never changed and held in this list.
Most recent shared year, 2024: Leo #5, Tiernan #2921.
Northern Ireland · Boys28 shared years, 1997–2024
Leo held the stronger position in 14 of those years, Tiernan in 14.
Highest recorded here: Leo #6 in 2023, Tiernan #52 in 2008.
The order changed in 2011: Leo moved ahead. In 2010 they stood at #101 and #68; by 2011 that had become #56 and #88.
Most recent shared year, 2024: Leo #12, Tiernan #125.
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 | Leo | Tiernan |
|---|---|---|
| Record type | Editorially researched profile | Official statistical record (evidence-only) |
| Gender usage | male | male |
| Meaning | Lion. | Not yet recorded |
| Origin | Latin | Not yet recorded |
| Pronunciation | /ˈliːoʊ/ | Not yet recorded |
| Syllables | 1 | 2 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ | GB-ENW, GB-NIR, GB-SCT, IE |
| Most recent popularity observation | New South Wales, Australia · Boys #5 (2025) | Republic of Ireland · Boys #115 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | Not yet recorded |
| Spelling simplicity (demonstration score) | 95/100 | 82/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Leo has a recorded origin (Latin); Tiernan does not have one recorded yet.
- Leo has 1 syllable, compared with 2 for Tiernan.
- A meaning is recorded for Leo; Tiernan doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, GB-SCT, IE.
How each name got here
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
Tiernan
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 recorded1997–2024
Highest recorded position: #52 among boys in Northern Ireland, in 2008 (recorded 1997–2024).
Northern Ireland · Boys
Most recent2025
Most recently recorded at #115 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys