Katelyn vs Molly
Katelyn and Mollycompared 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.
Republic of Ireland · Girls
In 2025, Katelyn was ranked #273 and Molly #20 among girls in Republic of Ireland.
Northern Ireland · Girls
In 2019, Katelyn was ranked #243 and Molly #31 among girls in Northern Ireland.
New Zealand · Girls
In 2010, Katelyn was ranked #92 and Molly #38 among girls in New Zealand.
New South Wales, Australia · Girls
In 2000, Katelyn was ranked #89 and Molly #54 among girls in New South Wales, Australia.
England and Wales · Girls
In 2024, Katelyn was ranked #2411 and Molly #104 among girls in England and Wales.
Katelyn and Molly over time
Katelyn and Molly appear together in 3 published lists, across 88 years of shared records. Molly held the stronger position in more years in 3 of them, Katelyn in 0.
In none of those lists did their order change and stay changed.
Katelyn reached its own highest recorded position earlier in 2 of those lists, Molly in 1. 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.
- Longest-running competitions
Katelyn and Molly were both ranked in Republic of Ireland · Girls for 36 years, from 1989 to 2025, ending at #273 and #20.
List by list
Republic of Ireland · Girls36 shared years, 1989–2025
Katelyn held the stronger position in 1 of those years, Molly in 35.
Highest recorded here: Katelyn #35 in 2003, Molly #18 in 2019.
The order between them never changed and held in this list.
Most recent shared year, 2025: Katelyn #273, Molly #20.
England and Wales · Girls29 shared years, 1996–2024
Katelyn held the stronger position in 0 of those years, Molly in 29.
Highest recorded here: Katelyn #185 in 2004, Molly #15 in 2001.
The order between them never changed and held in this list.
Most recent shared year, 2024: Katelyn #2411, Molly #104.
Northern Ireland · Girls23 shared years, 1997–2019
Katelyn held the stronger position in 0 of those years, Molly in 23.
Highest recorded here: Katelyn #60 in 2003, Molly #18 in 2007.
The order between them never changed and held in this list.
Most recent shared year, 2019: Katelyn #243, Molly #31.
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 | Katelyn | Molly |
|---|---|---|
| Record type | Official statistical record (evidence-only) | Official statistical record (evidence-only) |
| Gender usage | female | female |
| Meaning | Not yet recorded | Not yet recorded |
| Origin | Not yet recorded | Not yet recorded |
| Pronunciation | Not yet recorded | |
| Syllables | 3 | 2 |
| Common variants / nicknames | Not yet recorded | Not yet recorded |
| Recorded regional usage | AU-NSW, GB-ENW, GB-NIR, IE, NZ | AU-NSW, GB-ENW, GB-NIR, GB-SCT, IE, NO, NZ |
| Most recent popularity observation | Republic of Ireland · Girls #273 (2025) | Republic of Ireland · Girls #20 (2025) |
| Pronunciation clarity (demonstration score) | Not yet recorded | Not yet recorded |
| Spelling simplicity (demonstration score) | 82/100 | 94/100 |
| International familiarity (demonstration score) | 100/100 | 100/100 |
| Data Confidence | medium | medium |
What the data shows
- Katelyn has 3 syllables, compared with 2 for Molly.
- Both names have recorded usage in AU-NSW, GB-ENW, GB-NIR, IE, NZ.
How each name got here
Katelyn
Popularity journey
First recorded1989
First recorded at #503 among girls in Republic of Ireland in 1989 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Girls
Highest recorded1989–2025
Highest recorded position: #35 among girls in Republic of Ireland, in 2003 (recorded 1989–2025).
Republic of Ireland · Girls
Most recent2025
Most recently recorded at #273 among girls in Republic of Ireland, in 2025.
Republic of Ireland · Girls
Molly
Popularity journey
First recorded1989
First recorded at #408 among girls in Republic of Ireland in 1989 — the earliest year that source publishes this name, not necessarily the earliest it was used.
Republic of Ireland · Girls
Highest recorded1996–2024
Highest recorded position: #15 among girls in England and Wales, in 2001 (recorded 1996–2024).
England and Wales · Girls
Most recent2025
Most recently recorded at #217 among girls in Norway, in 2025.
Norway · Girls