Source Information & Methodology

Source information and methodology for Northern Ireland in United Kingdom.

Names Data Information
  • Data is sourced from Northern Ireland Statistics & Research Agency .
  • Data is Crown copyright, used by this site under terms of the Open Government Licence .
  • Names data is currently available for the years 1997‑2018.
  • The results are based on analysis of all births registered within the relevant reference year. This is not necessarily the year these births will have occurred (e.g. a birth that occurs near the end of December may not be registered until early January the following year).
  • Names with accents have had the accents removed and have been grouped with the equivalent names without accents. For example, the names Chloé, Chloë, Chloè and Chlöe have been grouped with Chloe.
  • Names with apostrophes have had the apostrophes removed and have been grouped with the equivalent names without apostrophes. For example, the name Mika'il has been grouped with Mikail.
  • Question marks, commas and any non-English alphabet characters have been removed from names.
  • Where a hyphen is present, any spaces occurring before or after it have been removed. For example, Lindsey‑ Louise will appear in the statistics as Lindsey‑Louise.
  • Names have been converted to ‘proper case’ format, so names with the same spelling but different capitalisation have been grouped. For example, the name McKenzie will have been grouped with Mckenzie. A few names will have a lower-case letter where there should be an upper-case letter. For example, a forename of AJ will appear as Aj.
  • The available names data has been used to produce the following statistics for each name:
    • Rank: The position of a name when the list of names for a given year has been placed in order from highest count to lowest count. Names with an equal count have been given the same rank, and placed in alphabetical order in popularity tables.
    • Change in rank: The difference in ranks of a name between a given year and a previous year.
    • Count: The number of boys or girls given a particular name in a given year.
    • Relative change in count: The relative difference in counts between a given year and a previous year. The relative change is not the actual difference between counts, but gives a better idea of the change from a previous year by taking into account the different total number of births for each year.
    • Percentage of total male/female births: The number of boys or girls given a particular name in a given year as a proportion of the total number of male or female births in that year.
    Relative change in count and percentage of total male/female births statistics are only available for years where number of births data is available.
  • New names data is added to the site when it becomes available, usually around July each year.
Births Data Information
  • Number of female and male births per year data is currently available for the years 1887‑2018.
  • Data is sourced from Northern Ireland Statistics & Research Agency .
  • New births data is added to the site when it becomes available, usually around November each year.