Lucas vs Theo
Lucas and Theocompared 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.
Scotland · Boys
In 2024, Lucas was ranked #23 and Theo #4 among boys in Scotland.
Northern Ireland · Boys
In 2024, Lucas was ranked #30 and Theo #5 among boys in Northern Ireland.
England and Wales · Boys
In 2025, Lucas was ranked #32 and Theo #12 among boys in England and Wales.
New South Wales, Australia · Boys
In 2025, Lucas was ranked #14 and Theo #32 among boys in New South Wales, Australia.
New Zealand · Boys
In 2023, Lucas was ranked #16 and Theo #19 among boys in New Zealand.
Republic of Ireland · Boys
In 2025, Lucas was ranked #64 and Theo #21 among boys in Republic of Ireland.
Norway · Boys
In 2025, Lucas was ranked #24 and Theo #22 among boys in Norway.
Lucas and Theo over time
Lucas and Theo appear together in 5 published lists, across 127 years of shared records. Lucas held the stronger position in more years in 5 of them, Theo in 0.
The order between them changed and held in 3 of those lists — a change in that published list, never a claim that one name displaced the other.
Lucas reached its own highest recorded position earlier in 5 of those lists, and Theo 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 2017, Theo moved ahead of Lucas in England and Wales · Boys — #27 and #29 the year before became #25 and #21.
- Closest over the longest run
Across 30 shared years in England and Wales · Boys, Lucas and Theo averaged 36.1 places apart, ending at #32 and #12.
- Longest-running competitions
Lucas and Theo were both ranked in England and Wales · Boys for 30 years, from 1996 to 2025, ending at #32 and #12.
List by list
Norway · Boys34 shared years, 1991–2025
Lucas held the stronger position in 31 of those years, Theo in 3.
Highest recorded here: Lucas #12 in 2012, Theo #17 in 2024.
The order between them never changed and held in this list.
Most recent shared year, 2025: Lucas #24, Theo #22.
England and Wales · Boys30 shared years, 1996–2025
Lucas held the stronger position in 21 of those years, Theo in 9.
Highest recorded here: Lucas #17 in 2009, Theo #9 in 2022.
The order changed in 2017: Theo moved ahead. In 2016 they stood at #27 and #29; by 2017 that had become #25 and #21.
Most recent shared year, 2025: Lucas #32, Theo #12.
Republic of Ireland · Boys30 shared years, 1988–2025
Lucas held the stronger position in 22 of those years, Theo in 8.
Highest recorded here: Lucas #55 in 2018, Theo #13 in 2024.
The order changed in 2019: Theo moved ahead. In 2018 they stood at #55 and #62; by 2019 that had become #55 and #48.
Most recent shared year, 2025: Lucas #64, Theo #21.
Northern Ireland · Boys23 shared years, 2001–2024
Lucas held the stronger position in 16 of those years, Theo in 7.
Highest recorded here: Lucas #22 in 2013, Theo #4 in 2022.
The order changed in 2018: Theo moved ahead. In 2017 they stood at #42 and #48; by 2018 that had become #39 and #18.
Most recent shared year, 2024: Lucas #30, Theo #5.
New Zealand · Boys10 shared years, 2014–2023
Lucas held the stronger position in 10 of those years, Theo in 0.
Highest recorded here: Lucas #5 in 2019, Theo #19 in 2023.
The order between them never changed and held in this list.
Most recent shared year, 2023: Lucas #16, Theo #19.
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 | Lucas | Theo |
|---|---|---|
| Record type | Editorially researched profile | Editorially researched profile |
| Gender usage | male | male |
| Meaning | The Latin form of the Greek name Loukas, ultimately linked to the English name Luke. The deeper root meaning is itself disputed — possibly a shortened form of 'from Lucania' (a region of southern Italy), or alternatively derived from the Latin name Lucius. | Gift of God. |
| Origin | Latin, via Greek Loukas | Greek, via Theodore/Theodora |
| Pronunciation | /ˈluːkəs/ | /ˈθioʊ/ |
| Syllables | 2 | 1 |
| Common variants / nicknames | Not yet recorded | Teddy |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ |
| Most recent popularity observation | New South Wales, Australia · Boys #14 (2025) | England and Wales · Boys #12 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | 90/100 |
| Spelling simplicity (demonstration score) | 94/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | high |
What the data shows
- Lucas is recorded with a Latin, via Greek Loukas origin, while Theo is recorded with a Greek, via Theodore/Theodora origin.
- Lucas has 2 syllables, compared with 1 for Theo.
- Lucas's recorded meaning differs from Theo's — see the table above for each.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ.
- The available evidence gives Lucas a "medium" Data Confidence level and Theo a "high" level — this reflects how complete and corroborated the underlying evidence is, not a judgement of either name.
How each name got here
Lucas
Popularity journey
First recorded1976
First recorded at #607 among boys in Norway in 1976 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded1980–2025
Highest recorded position: #2 among boys in New South Wales, Australia, in 2011 (recorded 1980–2025).
New South Wales, Australia · Boys
Most recent2025
Most recently recorded at #32 among boys in England and Wales, in 2025.
England and Wales · Boys
Theo
Popularity journey
First recorded1986
First recorded at #637 among boys in Norway in 1986 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded2001–2024
Highest recorded position: #4 among boys in Northern Ireland, in 2022 (recorded 2001–2024).
Northern Ireland · Boys
Most recent2025
Most recently recorded at #12 among boys in England and Wales, in 2025.
England and Wales · Boys