Irish Name Spellings in the 1926 Census

The same person's name could appear in a dozen different forms in Irish census records — depending on whether the enumerator wrote what they heard, translated it, or anglicised it. If you can't find an ancestor by their exact name, a spelling variant is often the reason.

Why Names Varied

In 1926, Ireland was in the middle of a long transition between Irish- and English-language naming conventions. Census enumerators wrote names as they understood them, leading to several sources of variation:

• Irish–English translation — Tadhg became Timothy or Thaddeus; Máire became Mary or Marie; Seán became John or Shane
• Phonetic anglicisation — Enumerators wrote what they heard: Meagher / Maher, Whelan / Phelan / Felan, Ó Murchú / Murphy / Morphy
• O' and Mac prefix variation — O'Brien, Brien, Brian, and Bryan all appear in the data. The O' prefix was frequently dropped or reattached depending on the writer.
• Fitz prefix — Fitzgerald and FitzGerald both appear
• Regional spelling conventions — The same name was written differently in different counties
• Diacritics removed — Accented characters (á, é, í, ó, ú) were often dropped by English-speaking enumerators

The search tool at 1926census.ie handles this using two mechanisms: curated spelling clusters drawn from Patrick Woulfe's Irish Names and Surnames (1922) and Robert Matheson's Varieties and Synonymes of Surnames and Christian Names in Ireland (1901), and a phonetic (Metaphone) fallback for zero-result searches.

Common Surname Variants

The table below shows the most frequently searched surnames and their recorded variants in Irish census records. Click any name to search it directly.

Common First Name Variants

First names in 1926 Ireland were particularly prone to variation. The same person might be called Patrick in English and Pádraig in Irish — or nicknamed Paddy on the census form. The table below shows the most common clusters.

The O' and Mac Prefixes

The prefix question is one of the biggest sources of missed records. In 1926, whether a family used the O' or Mac prefix — and whether the enumerator wrote it — was inconsistent. The same family could appear as O'Brien in one household and Brien in the next door neighbour's.

The search tool normalises this: searching "O'Brien" and "Brien" will each find records with and without the prefix. For Mac/Mc names, both forms are recognised — searching McMahon will also match MacMahon.

Searching by Name Variant on 1926census.ie

The search tool handles variants automatically:

• Type any spelling of a surname — variant chips appear showing known alternatives
• Click a chip to switch to that spelling
• Use partial matching — "phe" will find Phelan, Phelan, Phelps and others
• For first names, variant chips appear after typing in the First Name field
• If a search returns zero results, the tool suggests phonetically similar surnames automatically

Sources

The name variant clusters used by this tool are drawn from two primary sources:

• Patrick Woulfe, Irish Names and Surnames (M.H. Gill & Son, 1922) — available via the Internet Archive
• Robert Matheson, Varieties and Synonymes of Surnames and Christian Names in Ireland (1901) — available via the Internet Archive

Matheson's work was based on analysis of the 1890 birth registration data and is particularly useful for understanding how Irish names were anglicised in the late 19th and early 20th centuries — exactly the period that produced the people recorded in the 1926 Census.