John Keane & Mary Jane Bergin

I am trying to locate living relatives of Mary Jane Bergin sister of Fr. Michael Bergin, originally of Farncourt Roscrea.  Fr Bergin was killed during WW1 and was standing beside my great uncle when a shell landed and wounded both men.  Taken to the local military hospital they both died of their wounds on the 12 October 1917.  I would like to make contact with any living relatives and I understand that Mary Jane Bergin married John Keane (of Moyvure Westmeath)  in Roscrea in 1901 and had four daughters and one son (James Ignatius Keane). If there are any living descendents I am very keen to make contact.  Marianne