I attach copy of Church and State records which appear to relate to your query. Mary Teehan (Gibbons) according to the 1911 census was born in County Mayo.
The Church record states she was from Aughagower which is on the East side of Westport town in Co. Mayo, off the road to Ballinrobe.
Michael is recorded as a "Widower".
Those records will help you to track down his siblings and their various families. PS - 1901 should read 1911