Margaret married William Peter COSTELLO on 29 Jun 1892 in Pembroke, Renfrew, Ontario, Canada. William (son of Francis COSTELLO and Catherine Mary MACDONALD) was born in 1866 in Meath, Renfrew Co., Ontario, Canada; died in 1963 in Pembroke, Renfrew, Ontario, Canada; was buried in Pembroke, Renfrew, Ontario, Canada. [Group Sheet] [Family Chart]

1. Marie Ellen COSTELLO was born in 1894; and died.
2. Joseph Francis COSTELLO was born in 1896; and died.
3. William Peter COSTELLO was born in 1899; and died.
4. Janet COSTELLO was born in 1905; and died.
5. Margaret Cecilia COSTELLO was born on 24 Mar 1907 in Pembroke, Renfrew, Ontario, Canada; died on 16 Feb 1974 in South Porcupine, Cochrane, Ontario, Canada; was buried in Kirkland Lake, Temiskaming, Ontario, Canada.