The Father Dineen who keberoxu mentioned on 31 Dec 2018 is well-known in Irish (Gaelic) language circles for his Irish-English dictionary first published in 1904.
https://celt.ucc.ie/Dinneen1sted.html

keberoxu gave a link to this article: http://www.focloir.com/maclochlainn-on-dinneen.php