Mathias vs Rio
Mathias and Riocompared 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, Mathias was ranked #406 and Rio #166 among boys in England and Wales.
Northern Ireland · Boys
In 2021, Mathias was ranked #433 and Rio #176 among boys in Northern Ireland.
Republic of Ireland · Boys
In 2025, Mathias was ranked #432 and Rio #244 among boys in Republic of Ireland.
Mathias and Rio over time
Mathias and Rio appear together in 2 published lists, across 37 years of shared records. Rio held the stronger position in more years in 2 of them, Mathias 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.
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
Mathias held the stronger position in 0 of those years, Rio in 28.
Highest recorded here: Mathias #406 in 2024, Rio #155 in 2008.
The order between them never changed and held in this list.
Most recent shared year, 2024: Mathias #406, Rio #166.
Republic of Ireland · Boys8 shared years, 2014–2025
Mathias held the stronger position in 1 of those years, Rio in 7.
Highest recorded here: Mathias #396 in 2023, Rio #244 in 2025.
The order changed in 2015: Rio moved ahead. In 2014 they stood at #550 and #609; by 2015 that had become #615 and #459.
Most recent shared year, 2025: Mathias #432, Rio #244.
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 | Mathias | Rio |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Official statistical record (evidence-only) |
| Gender usage | male | Used for both boys and girls |
| Meaning | Not yet recorded | Not yet recorded |
| Origin | Not yet recorded | Not yet recorded |
| Pronunciation | Not yet recorded | |
| Syllables | 2 | 1 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | GB-ENW, GB-NIR, IE, NO | GB-ENW, GB-NIR, GB-SCT, IE |
| Most recent popularity observation | Norway · Boys #41 (2025) | Republic of Ireland · Boys #244 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 82/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Mathias has 2 syllables, compared with 1 for Rio.
- Both names have recorded usage in GB-ENW, GB-NIR, IE.
How each name got here
Mathias
Popularity journey
First recorded1945
First recorded at #307 among boys in Norway in 1945 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded1945–2025
Highest recorded position: #2 among boys in Norway, in 2004 (recorded 1945–2025).
Norway · Boys
Most recent2025
Most recently recorded at #41 among boys in Norway, in 2025.
Norway · Boys
Rio
Popularity journey
First recorded1996
First recorded at #594 among girls in England and Wales in 1996 — the earliest year that source publishes this name, not necessarily the earliest it was used.
England and Wales · Girls
Most recent2025
Most recently recorded at #244 among boys in Republic of Ireland, in 2025.
Republic of Ireland · Boys