John Colahan
British Army general

John Joseph Aloysius Colahan (30 March 1836 – 19 November 1918) was Surgeon Major General in the British Army.
Family
The eldest of the four children of Professor Nicholas Colahan (1806–1890), and his first wife, Sarah Colahan (1814–49), née Whistler, John Joseph Aloysius Colahan was born in Galway, Ireland on 30 March 1836. His three siblings were Mary Josephine Colahan (1843–1912), Francis Colahan (1843–), and William Henry Colahan (1848–).
He married Eliza McDowell Orr (1859–1899), a concert pianist, in Malta, in 1885. They had six children: Mary Margarita Colahan (1886–1965); Beatrice Clare Colahan (1889–1984); Frederick John Orr Colahan (1892–1982); John Maurice Orr "Jack" Colahan (1894–1917); the artist Colin Cuthbert Orr Colahan (1897–1987); and Basil Nicholas Orr Colahan (1898–1980).
Medical career
Colahan graduated M.D. at Queen's University, Galway in 1857, and served as an army surgeon in India, Gibraltar and Malta. He served as Principal Medical Officer in Ireland. The family moved from Dublin to Cape Town in 1889, then to Victoria, Australia, in 1896.
Colahan died in the Melbourne seaside suburb of St Kilda on 19 November 1918.
Footnotes
References
The Colahans - A Remarkable Galway Family, Diarmuid Ó Cearbhaill, Journal of the Galway Archaeological and Historical Society, volume 54, 2002, pp.
This brief starts where responsible research should: with the source description of “John Colahan” as british Army general. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the general reference register because the source frames it as british Army general. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jul 19, 2026. The linked authority identifier is Q6226579. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1836, 1918, 1806 and 1890.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “John Colahan”, its source revision and the description used here.
- Expand the search: follow John Colahan primary sources, John Colahan archive and John research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “John Colahan”?
- What terminology or title could unlock a more precise catalogue search?
- Which cited source is closest to the event, object or claim?
Search terms from this dossier
This entry incorporates text from “John Colahan” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.