Modern ones If you are looking for a registered birth 'do' check up to 10 years later. A trawl of Irish Indexes for only ONE particular name found 28 entries in 15 years spread.. Registered 1927 b 1921 " 1939 b 1922 " 1927 b 1921 and a problem for someone later on Registered 1942 born 1926 No doubt to do with pensions...however It must be quite common as this was for a One NameStudy Josi