thank you, Peter. At the very end of the RTÉ report on the funeral of Meaití Jo Shéamuis, it says that there is a tradition in Conamara of singin Amhrán Mháinse at the graveside of past winners of Corn uí Riada.

Also known as Amhrán Mhuighnise or Amhrán Mhuínse, it is the song, well known among singers of Irish-language songs, of a woman from Mweenish/ Muínis who had married a man from the mainland but said she wished to be buried in her native island.
https://lyricstranslate.com/en/amhr%C3%A1n-mhu%C3%ADnse-song-muighinis.html

Another interesting article in Irish about Meaití and his background, was published a couple of years ago (when he was alive)
https://www.taiscecf.ie/ealaiontoiri/meaiti-joe-sheamuis