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Person
Desmond Joseph O'Brien
Knowledge Panel
Desmond Joseph O'Brien (fl. 1919–2005 ) was a historical individual who has been identified in records relating to modern Ireland, after 1922.
The date range (fl. 1919–2005 ) displayed for Desmond Joseph O'Brien is called a ‘floruit’. This is an approximate date range. It suggests the broadest period in which Desmond Joseph O'Brien is known, or can reasonably be inferred, to have lived.
Depending on the historical evidence available, a floruit may represent the full lifespan of an individual, or a shorter period in which they are known to have been active.
O'Brien was born on 22 May 1919 and died on 26 December 2005.
Desmond Joseph O'Brien has been identified as a person of Irish historical significance, with a biographical entry in the Dictionary of Irish Biography. You can read an extract from the entry for O'Brien below. A corresponding entry has also been identified for Desmond Joseph O'Brien in Wikidata.
Place of Birth: Dublin and Ireland.
Place of Death: Scotland.
Desmond Joseph O'Brien shared his surname with other individuals in the Irish historical record. To find O'Brien in some of these documents, or to discover other individuals with the same surname, search here using the Virtual Treasury. To locate references to Desmond Joseph O'Brien, you can use the website’s Advanced Search tools for an exact match, or use the floruit dates (fl. 1919–2005 ) to help narrow your search.
General information
| Normalised First Name | Desmond Joseph |
| Normalised Surname | O'Brien |
| Floruit | 1919 — 2005 |
| Birth Date | 22 May 1919 |
| Death Date | 26 December 2005 |
| Gender | Male |
| DIB Page | OBrien Desmond Joseph Des a9496 |
| Wikidata Page | Q3024039 |
Date Information
Historical dates are not always recorded with the same level of certainty as modern biographical information. For many individuals, particularly those who lived in earlier periods, exact birth and death dates are unknown.
The Knowledge Graph typically displays a single date range for each individual. This range represents the broadest period during which the person is known, or can reasonably be inferred, to have lived or been active.
This date range should not always be understood as a confirmed lifespan.
Where precise birth and death dates are known, the range reflects those dates.
Where evidence is limited, the range for a given person is approximate. An approximate date range is known as a floruit (fl.) This term, derived from Latin, indicates the period of time in which a person ‘flourished’. In the Knowledge Graph, it is used to indicate the broadest period during which a person is known to have been active, particularly when life dates are unknown.
Floruits may be derived from:
- Documentary references
- Known periods of activity or office-holding
- Expert inference from contextual evidence
Where more detailed dating information is available, it is displayed in the General Informational panel located on individual entity pages.
This may include:
- Date of Birth
- Date of Death
These categories are used where birth or death dates are known with reasonable certainty.
Where a single date appears for dates of birth or death, this may be interpreted as a confirmed date.
Where a date range appears in these fields, it indicates that an individual was born or died at some point within this date range.
