This article needs attention from an expert in Ireland. The specific problem is: Looks like synthesis - I can't find any source which lumps all these topics together as a unified concept.WikiProject Ireland may be able to help recruit an expert.(October 2020)
Hiberno-Norman or Old English (Ireland) nobility: descendants of the colonisers who came to Ireland from Wales, Normandy and England after the Norman invasions of England and Ireland in 1066 and 1169–71, respectively.
Peerage of Ireland, whose titles were created by the English and later British monarchs of Ireland in their capacity as Lord or King of Ireland.
These groups are not mutually exclusive. There is some overlap between the first two groups (prior to the Treaty of Limerick), and a lesser degree of overlap between the last two groups (prior to the declaration of the Republic of Ireland). Such overlaps may be personal (e.g. a Gaelic noble who was "regranted" his titles by King Henry VIII of England), or they may be geographical[clarification needed] (i.e. different noble traditions co-existing in neighbouring parts of the country, which were only distinguished by the date when they finally fell under the Dublin Castle administration).[citation needed]
Today
In the Republic of Ireland, the Irish Constitution precludes the State from conferring titles of nobility, and prevents citizens from accepting titles of nobility or honour – except with the prior approval of the government.[1] Existing holders of aristocratic titles continue to use them, but they are not recognised by the Irish government.
While some representatives of clans and families had obtained "courtesy recognition" as Chiefs of the Name from the Chief Herald of Ireland, this practice was discontinued by 2003 – with the Attorney General noting that such recognitions were unconstitutional and without basis in law.[2][3][4]