Kelsey vs Theodor
Kelsey and Theodorcompared 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 2016, Kelsey was ranked #4023 and Theodor #774 among boys in England and Wales.
Kelsey and Theodor over time
Kelsey and Theodor appear together in 1 published list, across 17 years of shared records. Kelsey held the stronger position in more years in 1 of them, Theodor 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.
Kelsey reached its own highest recorded position earlier in 1 of those lists, and Theodor 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.
List by list
England and Wales · Boys17 shared years, 1996–2016
Kelsey held the stronger position in 11 of those years, Theodor in 6.
Highest recorded here: Kelsey #563 in 1999, Theodor #774 in 2016.
The order changed in 2007: Theodor moved ahead. In 2006 they stood at #1643 and #2870; by 2007 that had become #3095 and #1440.
Most recent shared year, 2016: Kelsey #4023, Theodor #774.
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 | Kelsey | Theodor |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Editorially researched profile |
| Gender usage | female | male |
| Meaning | Not yet recorded | The German form of Theodore, and a Scandinavian, Czech and Romanian variant of Teodor — from Greek 'theos' (god) and 'doron' (gift), 'gift of God'. |
| Origin | Not yet recorded | Greek roots, transmitted through German and Scandinavian naming traditions as a Teodor variant |
| Pronunciation | Not yet recorded | /ˈteː.o.doːɐ̯/ |
| Syllables | 2 | 2 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | GB-ENW, GB-NIR, GB-SCT, IE, NZ | GB-ENW, GB-NIR, GB-SCT, IE, NO |
| Most recent popularity observation | Republic of Ireland · Girls #544 (2025) | Norway · Boys #11 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | 90/100 |
| Spelling simplicity (demonstration score) | 88/100 | 82/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Theodor has a recorded origin (Greek roots, transmitted through German and Scandinavian naming traditions as a Teodor variant); Kelsey does not have one recorded yet.
- Kelsey and Theodor both have 2 syllables.
- A meaning is recorded for Theodor; Kelsey doesn't have one written yet.
- Both names have recorded usage in GB-ENW, GB-NIR, GB-SCT, IE.
How each name got here
Kelsey
Popularity journey
First recorded1989
First recorded at #80 among girls in New Zealand in 1989 — the earliest year that source publishes this name, not necessarily the earliest it was used.
New Zealand · Girls
Highest recorded1989–1999
Highest recorded position: #48 among girls in New Zealand, in 1991 (recorded 1989–1999).
New Zealand · Girls
Most recent2025
Most recently recorded at #544 among girls in Republic of Ireland, in 2025.
Republic of Ireland · Girls
Theodor
Popularity journey
First recorded1948
First recorded at #363 among boys in Norway in 1948 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Norway · Boys
Highest recorded1948–2025
Highest recorded position: #8 among boys in Norway, in 2024 (recorded 1948–2025).
Norway · Boys
Most recent2025
Most recently recorded at #11 among boys in Norway, in 2025.
Norway · Boys