Luca vs Theo
Luca 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.
New Zealand · Boys
In 2023, Luca was ranked #3 and Theo #19 among boys in New Zealand.
New South Wales, Australia · Boys
In 2025, Luca was ranked #4 and Theo #32 among boys in New South Wales, Australia.
Scotland · Boys
In 2024, Luca was ranked #6 and Theo #4 among boys in Scotland.
Northern Ireland · Boys
In 2024, Luca was ranked #7 and Theo #5 among boys in Northern Ireland.
England and Wales · Boys
In 2024, Luca was ranked #7 and Theo #12 among boys in England and Wales.
Republic of Ireland · Boys
In 2025, Luca was ranked #11 and Theo #21 among boys in Republic of Ireland.
Norway · Boys
In 2025, Luca was ranked #60 and Theo #22 among boys in Norway.
England and Wales · Girls
In 2024, Luca was ranked #3318 and Theo #5891 among girls in England and Wales.
Luca and Theo over time
Luca and Theo appear together in 5 published lists, across 120 years of shared records. Theo held the stronger position in more years in 3 of them, Luca in 2.
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.
Theo reached its own highest recorded position earlier in 4 of those lists, and Luca 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 2023, Luca moved ahead of Theo in England and Wales · Boys — #12 and #9 the year before became #7 and #11.
- Repeatedly exchanged positions
Luca and Theo changed places 5 times in Northern Ireland · Boys between 2001 and 2024, ending at #7 and #5.
- Closest over the longest run
Across 29 shared years in England and Wales · Boys, Luca and Theo averaged 21.8 places apart, ending at #7 and #12.
- Longest-running competitions
Luca and Theo were both ranked in Norway · Boys for 30 years, from 1990 to 2025, ending at #60 and #22.
- Peaked in the same years
Both reached their highest recorded position in England and Wales · Boys within 2 years — Luca #7 in 2023, Theo #9 in 2022.
List by list
Norway · Boys30 shared years, 1990–2025
Luca held the stronger position in 2 of those years, Theo in 28.
Highest recorded here: Luca #60 in 2025, Theo #17 in 2024.
The order changed in 1996: Theo moved ahead. In 1995 they stood at #502 and #563; by 1996 that had become #528 and #495.
Most recent shared year, 2025: Luca #60, Theo #22.
England and Wales · Boys29 shared years, 1996–2024
Luca held the stronger position in 12 of those years, Theo in 17.
Highest recorded here: Luca #7 in 2023, Theo #9 in 2022.
The order changed in 2023: Luca moved ahead. In 2022 they stood at #12 and #9; by 2023 that had become #7 and #11.
Most recent shared year, 2024: Luca #7, Theo #12.
Republic of Ireland · Boys28 shared years, 1997–2025
Luca held the stronger position in 18 of those years, Theo in 9.
Highest recorded here: Luca #11 in 2025, Theo #13 in 2024.
The order changed in 2025: Luca moved ahead. In 2024 they stood at #24 and #13; by 2025 that had become #11 and #21.
Most recent shared year, 2025: Luca #11, Theo #21.
Northern Ireland · Boys23 shared years, 2001–2024
Luca held the stronger position in 9 of those years, Theo in 13.
Highest recorded here: Luca #7 in 2024, Theo #4 in 2022.
The order between them never changed and held in this list.
Most recent shared year, 2024: Luca #7, Theo #5.
New Zealand · Boys10 shared years, 2014–2023
Luca held the stronger position in 10 of those years, Theo in 0.
Highest recorded here: Luca #3 in 2023, Theo #19 in 2023.
The order between them never changed and held in this list.
Most recent shared year, 2023: Luca #3, 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 | Luca | Theo |
|---|---|---|
| Record type | Editorially researched profile | Editorially researched profile |
| Gender usage | male | male |
| Meaning | The Italian and Romanian form of Lucas, itself probably a shortened form of the Greek 'Loukanos', meaning 'from Lucania' (a region of southern Italy). | Gift of God. |
| Origin | Italian, via Greek Loukas | Greek, via Theodore/Theodora |
| Pronunciation | /ˈluːkə/ | /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 #4 (2025) | Republic of Ireland · Boys #21 (2025) |
| Pronunciation clarity (demonstration score) | 90/100 | 90/100 |
| Spelling simplicity (demonstration score) | 95/100 | 95/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | high |
What the data shows
- Luca is recorded with a Italian, via Greek Loukas origin, while Theo is recorded with a Greek, via Theodore/Theodora origin.
- Luca has 2 syllables, compared with 1 for Theo.
- Luca'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 Luca 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
Luca
Popularity journey
First recorded1973
First recorded at #603 among boys in Norway in 1973 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded2004–2023
Highest recorded position: #3 among boys in New Zealand, in 2023 (recorded 2004–2023).
New Zealand · Boys
Most recent2025
Most recently recorded at #4 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · 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 #32 among boys in New South Wales, Australia, in 2025.
New South Wales, Australia · Boys