The handbook connects Billy to William and William to Vilhelm. Its Old High German elements refer to will and helmet; the licensed phrase resolute protector is not used as a literal translation. This describes a documented naming tradition, not every independent use or a bearer's personality. English pronunciation is not inferred from these etymological sources.
Origin
English
Licensed Oddity Software Baby Names Plus database. Cleaned and matched to this spelling; not independently verified. The source label may describe language, region, or tradition rather than a precise linguistic derivation.
Oddity Software · licensed source label.
English pronunciation
/ˈbɪli/
Recorded English reading of the William diminutive.
Recorded English reading, as published. Accents and preferred pronunciations can differ.
Published name usage
Counts apply only to the exact spelling, place, year and recorded usage shown. Places are separate; these figures are never added into a worldwide total. Missing or suppressed records never mean zero.
Latest published record available for this spelling in each place and recorded usage
Place
Year
Recorded usage
Published births
Rank
Notes
Canada
2020
Girls
7
2591
2025 figures are preliminary. Quebec counts below five are randomly imputed by the publisher before national aggregation. Accents are removed in the source; this profile was matched only where the catalog spelling was unambiguous. Unpublished values are unknown, not zero. Rank basis: source published.
Canada
2025
Boys
56 · preliminary
525
2025 figures are preliminary. Quebec counts below five are randomly imputed by the publisher before national aggregation. Accents are removed in the source; this profile was matched only where the catalog spelling was unambiguous. Unpublished values are unknown, not zero. Rank basis: source published.
France
2025
Girls
10 (rounded to 5)
2701
Counts are rounded to the nearest multiple of five. Ranks use unrounded publisher counts with randomly ordered ties; equally rounded counts can have different ranks. National coverage excludes Mayotte before 2012. Missing years are unavailable, not zero. Automated direction labels are withheld for this rounded-count series. Rank basis: source published.
France
2025
Boys
70 (rounded to 5)
613
Counts are rounded to the nearest multiple of five. Ranks use unrounded publisher counts with randomly ordered ties; equally rounded counts can have different ranks. National coverage excludes Mayotte before 2012. Missing years are unavailable, not zero. Automated direction labels are withheld for this rounded-count series. Rank basis: source published.
England & Wales
2019
Girls
3
5591
Historical source: not all years independently cross-checked. Rank basis: source published.
England & Wales
2025
Boys
481
110
Source-reported counts; unpublished names are not zero. Rank basis: source published.
Northern Ireland
2025
Boys
9
212
Source-reported counts; unpublished names are not zero. Rank basis: source published.
Scotland
2025
Boys
20
208
Source-reported counts; unpublished names are not zero. Rank basis: source published.
Ireland
2025
Boys
122
39
Names below three occurrences are unpublished. Accent recording changed in 2018; comparisons across that boundary may not describe the same spelling coverage. Counts refer to registrations in the year. Missing years are unavailable, not zero. Rank basis: source published.
United States
2025
Girls
14
7491
Source-reported counts; unpublished names are not zero. Rank basis: calculated from published counts.
United States
2025
Boys
203
1068
Source-reported counts; unpublished names are not zero. Rank basis: calculated from published counts.
Canada, Ireland and France coverage includes confidently matched existing profiles only; unmatched spellings are awaiting review. French counts are rounded to five.
Sources & notes
Open an entry for its source, credit, licence and full qualifications. Different name traditions remain separate.
Language of use: English
Checked against cited source
The exact English proper-name entry explicitly documents given-name use. Credit: Wiktionary contributors. Adapted and condensed by Rare Baby Names; CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). No source audio reused.
Credit: Wiktionary contributors. Adapted by Rare Baby Names: wording shortened and name contexts separated. Recorded pronunciations are shown as published.
This adapted text is available under CC BY-SA 4.0.
CC BY-SA 4.0
Meaning: Will and helmet, in the William-linked tradition.
Checked against cited source
The handbook connects Billy to William and William to Vilhelm. Its Old High German elements refer to will and helmet; the licensed phrase resolute protector is not used as a literal translation. This describes a documented naming tradition, not every independent use or a bearer's personality. English pronunciation is not inferred from these etymological sources. Credit: Eva Brylla and Katharina Leibring, Förnamn i Sverige – kortfattat namnlexikon, second edition (Isof, 2026). Source: https://isof.diva-portal.org/smash/get/diva2:2041530/FULLTEXT01.pdf#page=91, https://isof.diva-portal.org/smash/get/diva2:2041530/FULLTEXT01.pdf#page=403, https://isof.diva-portal.org/smash/get/diva2:2041530/FULLTEXT01.pdf#page=402. License: Original factual summary; source rights retained (https://isof.diva-portal.org/smash/get/diva2:2041530/FULLTEXT01.pdf). Copyright remains with Charlotta Seiler Brylla, Katharina Leibring and Isof. Adaptation: Rare Baby Names wrote an original brief English explanation, preserving conditional routes and uncertainty; no source passages, images or recordings are reproduced.
The exact given-name entry documents these short-form relationships. These are formation descriptions, not a settled literal meaning; a parent name’s etymology is not automatically a universal translation of this short form. Credit: Wiktionary contributors. Adapted and condensed by Rare Baby Names; CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). No source audio reused.
Credit: Wiktionary contributors. Adapted by Rare Baby Names: wording shortened and name contexts separated. Recorded pronunciations are shown as published.
This adapted text is available under CC BY-SA 4.0.
CC BY-SA 4.0
Short form of: William
Checked against cited source
Relationship explicitly recorded in the reviewed given-name section; spellings remain separate in popularity statistics.
Credit: Wiktionary contributors. Adapted by Rare Baby Names: wording shortened and name contexts separated. Recorded pronunciations are shown as published.
This adapted text is available under CC BY-SA 4.0.
CC BY-SA 4.0
Origin: English
Oddity Software · licensed source
Licensed Oddity Software Baby Names Plus database. Cleaned and matched to this spelling; not independently verified. The source label may describe language, region, or tradition rather than a precise linguistic derivation.
Licensed publication use; not an open-data license
English pronunciation: /ˈbɪli/
Checked against cited source
Recorded English reading of the William diminutive.
Credit: Wiktionary contributors. Adapted by Rare Baby Names: wording shortened and name contexts separated. Recorded pronunciations are shown as published.
Statistics Canada, Table 17-10-0147-01, 1991–2025, released 23 September 2026.
Credit: Statistics Canada, Table 17-10-0147-01, 1991–2025, released 23 September 2026.
License: Statistics Canada Open Licence
Adaptation: Adapted from Statistics Canada, First names at birth by sex at birth, selected indicators, Table 17-10-0147-01, reference years 1991–2025. This does not constitute an endorsement by Statistics Canada of this product.
Central Statistics Office, Ireland, VSA50 and VSA60, updated 27 February 2026.
Credit: Central Statistics Office, Ireland, VSA50 and VSA60, updated 27 February 2026.
License: CC BY 4.0
Adaptation: Adapted by Rare Baby Names: joined the published count and rank indicators and matched unambiguous existing spellings. Source values retained.
Source : Insee, Fichier des prénoms, updated 16 July 2026.
Credit: Source : Insee, Fichier des prénoms, updated 16 July 2026.
License: Open Licence 2.0 (Etalab)
Adaptation: Adapted by Rare Baby Names: column names and sex codes mapped and unique case-only spellings matched to existing profiles. Published rounded counts and ranks retained.