Muireann vs Thea
Muireann and Theacompared 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 · Girls
In 2017, Muireann was ranked #4763 and Thea #53 among girls in England and Wales.
Northern Ireland · Girls
In 2024, Muireann was ranked #253 and Thea #75 among girls in Northern Ireland.
Republic of Ireland · Girls
In 2025, Muireann was ranked #196 and Thea #207 among girls in Republic of Ireland.
Muireann and Thea over time
Muireann and Thea appear together in 2 published lists, across 47 years of shared records. Neither was ahead in more lists than the other.
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.
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.
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 2013, Thea moved ahead of Muireann in Northern Ireland · Girls — #268 and #451 the year before became #370 and #178.
- Longest-running competitions
Muireann and Thea were both ranked in Republic of Ireland · Girls for 31 years, from 1993 to 2025, ending at #196 and #207.
- Peaked in the same years
Both reached their highest recorded position in Northern Ireland · Girls within 2 years — Muireann #181 in 2021, Thea #40 in 2019.
List by list
Republic of Ireland · Girls31 shared years, 1993–2025
Muireann held the stronger position in 28 of those years, Thea in 3.
Highest recorded here: Muireann #87 in 2011, Thea #136 in 2021.
The order between them never changed and held in this list.
Most recent shared year, 2025: Muireann #196, Thea #207.
Northern Ireland · Girls16 shared years, 2005–2024
Muireann held the stronger position in 5 of those years, Thea in 11.
Highest recorded here: Muireann #181 in 2021, Thea #40 in 2019.
The order changed in 2013: Thea moved ahead. In 2012 they stood at #268 and #451; by 2013 that had become #370 and #178.
Most recent shared year, 2024: Muireann #253, Thea #75.
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 Thea
Pairs where Thea shares a published list with another name, each measured inside one registrar's own list.
- Thea vs Eva
Over 63 shared years in Norway · Girls, Thea rose about as far as Eva fell — from #380 and #9 in 1950 to #50 and #22 in 2025.
Thea · Eva · 63 shared years, 1950–2025 · Mirrored each other
- Thea vs Heidi
Over 63 shared years in Norway · Girls, Thea rose about as far as Heidi fell — from #380 and #232 in 1950 to #50 and #437 in 2025.
Thea · Heidi · 63 shared years, 1950–2025 · Mirrored each other
- Thea vs Kristine
Over 63 shared years in Norway · Girls, Thea rose about as far as Kristine fell — from #380 and #159 in 1950 to #50 and #244 in 2025.
Thea · Kristine · 63 shared years, 1950–2025 · Mirrored each other
- Thea vs Nina
Over 63 shared years in Norway · Girls, Thea rose about as far as Nina fell — from #380 and #103 in 1950 to #50 and #195 in 2025.
Thea · Nina · 63 shared years, 1950–2025 · Mirrored each other
Side by side
| Field | Muireann | Thea |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | female | female |
| Meaning | Not yet recorded | A short form of Dorothea, Theodora, Theresa and other similar-sounding Greek-rooted names. |
| Origin | Not yet recorded | Greek (via Germanic/Scandinavian transmission) |
| Pronunciation | Not yet recorded | /ˈteː.a/ |
| Syllables | 2 | 1 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | GB-ENW, GB-NIR, IE | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ |
| Most recent popularity observation | Republic of Ireland · Girls #196 (2025) | Norway · Girls #50 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 76/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Thea has a recorded origin (Greek (via Germanic/Scandinavian transmission)); Muireann does not have one recorded yet.
- Muireann has 2 syllables, compared with 1 for Thea.
- A meaning is recorded for Thea; Muireann doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, IE.
How each name got here
Muireann
Popularity journey
First recorded1965
First recorded at #297 among girls in Republic of Ireland in 1965 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Girls
Highest recorded1965–2025
Highest recorded position: #87 among girls in Republic of Ireland, in 2011 (recorded 1965–2025).
Republic of Ireland · Girls
Most recent2025
Most recently recorded at #196 among girls in Republic of Ireland, in 2025.
Republic of Ireland · Girls
Thea
Popularity journey
First recorded1950
First recorded at #380 among girls in Norway in 1950 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Girls
Highest recorded1950–2025
Highest recorded position: #1 among girls in Norway, in 2006 (recorded 1950–2025).
Norway · Girls
Most recent2025
Most recently recorded at #66 among girls in England and Wales, in 2025.
England and Wales · Girls