English is not my native language and I didn't found the answer on the net. I read on different places "he died c.405", what does mean this 'c.' notation? Is it about centuries? (example here on Wikipedia: Uí Néill)

  • 6
    The 'c.' stands for circa, which means approximately (i.e. in your example the year of death isn't conclusively proved.)
    – Steve Bird
    Sep 5, 2021 at 12:22
  • Ok so it's 405 A.D in this case ? (I guess it is if B.C is not mentioned ?)
    – terzan5
    Sep 5, 2021 at 12:28
  • Without any other information, I'd assume A.D./C.E.
    – Steve Bird
    Sep 5, 2021 at 12:59
  • 3
    You may find that info spelled out here: en.wiktionary.org/wiki/circa Sep 5, 2021 at 13:03


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