Names of Guernsey

GG

Guernsey (the Greffe) — most common baby names (2025) records Lilly as the commonest given name in Guernsey.

Written in English, French.

Population
67K
Official registers
1
Name forms recorded
15
BBuilt from 1 official register (2025), 15 name forms in our corpus.

At least one official register, plus a written account of the naming system.

Guernsey girl and boy names

The commonest names given to girls and to boys, as Guernsey (the Greffe) — most common baby names published them for 2025. The full register tables, with their counts, are further down.

How names work in Guernsey

2 naming traditions are in use in Guernsey, listed in the order of the country's languages. They are separate systems, not variants of one, and each has its own page.

The most common names in Guernsey

Counts children born in the year · authority tier 2

This register publishes counts, not ranks; the numbering is the order of its own figures.

Guernsey (the Greffe) — most common baby names, 2025 — 7 given names counted over children born that year, girls only, as the register publishes them.
#NameBearers recordedOur rank
1Lilly7—
2Bonnie4—
3Imogen4—
4Amelia3—
5Ayla3—
6Hallie3—
7Olivia3—

Where the two lists disagree

9 of Guernsey (the Greffe) — most common baby names's top 9 given names sit five or more places away in our record corpus. Neither ranking is wrong; they count different people.

Guernsey (the Greffe) — most common baby names 2025Across all recordstheodore: 1 → not ranked · not in our corpus’s top ranks for this country1. theodorenot rankedharry: 2 → not ranked · not in our corpus’s top ranks for this country2. harrynot rankedleo: 3 → not ranked · not in our corpus’s top ranks for this country3. leonot rankedfreddie: 4 → not ranked · not in our corpus’s top ranks for this country4. freddienot rankedjack: 5 → not ranked · not in our corpus’s top ranks for this country5. jacknot rankednoah: 6 → not ranked · not in our corpus’s top ranks for this country6. noahnot rankedoliver: 7 → not ranked · not in our corpus’s top ranks for this country7. olivernot rankedtommy: 8 → not ranked · not in our corpus’s top ranks for this country8. tommynot rankedwilliam: 9 → not ranked · not in our corpus’s top ranks for this country9. williamnot ranked
Hover a line for what is available to explain that row.
Guernsey (the Greffe) — most common baby names, 2025 on the left; every record we hold for Guernsey on the right. A dashed line means the name is not in our top ranks for this country at all.

The register counts one population in one year — everyone it enumerates, once. Our corpus counts records: historical registers going back decades, the diaspora, business and place records, and several generations of births. A name that was common two generations ago outranks a name common today; a name whose spelling scatters across sources (diacritics dropped, transliterated differently) loses ground, because only its dominant spelling is ranked.

Scripts & spelling

Channelgiven name(measured from records)
Valesurname(measured from records)
Slaymakersurname(measured from records)
Prevostsurname(measured from records)
Poidevinsurname(measured from records)
The best-attested names in Guernsey, in the spelling our records use there. Where a Latin spelling is also attested it is shown beneath — a spelling from the corpus, not a machine romanisation.

Countries whose names look alike

Measured as the overlap between each country's top 300 given-name forms, weighted by how common each is — the fuzzy-set approach of Lauc (2024), on a truncated inventory.

Registers & sources

Official registers

About this data

Official figures are reproduced from the register named beside them, at the year named beside them, and are never combined across registers. The "across all records" ranking counts records in our own corpus — historical registers, the diaspora, business and place records — and is not a population count. Bearer estimates are omitted where a name accounts for more than a quarter of a country's records, because the estimate is not defensible there. Names listed by reference works and licensed name dictionaries are cited as attesting a name; their figures are not published.

Data snapshot: 2026-10-12.

Questions

What is the most common given name in Guernsey?
Theodore, according to Guernsey (the Greffe) — most common baby names (2025), with 5 bearers recorded among boys.
Why do sources disagree about the commonest name in Guernsey?
Because they count different people. Guernsey (the Greffe) — most common baby names (2025) counts one population once, and its commonest given name is Theodore. Our corpus counts every record we hold — historical registers, the diaspora, decades of births — and its commonest is Channel. Both are on this page, each with its denominator.
Is there one naming system in Guernsey?
No — 2 are described on this page (British, French), and they are separate systems rather than variants of one.

Cite this page: Mondonomo, “Names of Guernsey”, https://mondonomo.ai/names/GG (data snapshot 2026-10-12). Official figures from Guernsey (the Greffe) — most common baby names.