Frank Walsh,
Mary Kate was probably Catherine born in 1850. (baptismal name)
Parents were Owen McKenna & Ellen McInnis
below is a list containing her and her siblings, followed by the children of Phillip Rooney and Ellen Josephine McKenna
Children pf Owen McKenna & Ellen McInnis
Susan b:14 Apr 1854 Vernon River
Ellen Josephine b: 1 Jul 1867 Vernon River Spouse: Philip Rooney
Michael b: 2 Jun 1848
Catherine: b: 13 Apr 1850
Eugene b: 13 Aug 1852
Patrick b: 9 Apr 1864
Children of Philip Rooney & Ellen Josephine McKenna:
Rooney Michael Rooney b: 12 June 1895 Iona, Prince Edward Island, Canada
Rooney Mary Josephine Rooney b:29 June 1897 Iona, Prince Edward Island, Canada
Rooney Owen Eugene Rooney b: 29 May 1899 Iona, Prince Edward Island, Canada
Rooney Aileen Veronica Rooney b: 1-Aug-1905 baptized 6-Aug-1905 Vernon River
Rooney Catherine Veronica Rooney b: 24-Apr-1910 baptized 1-May-1910 Vernon River
Rooney Rose Ann Rooney b: 21-Oct-1912 baptized 27-Oct-1912 Vernon River
Rooney Alphonsus Rooney b: 6 October 1891 Iona, Prince Edward Island, Canada
Rooney James Rooney b: 23 August 1893 Iona, Prince Edward Island, Canada
Rooney William Louis Rooney b: 29-Mar-1903 baptized 1-Apr-1903 Iona
Rooney Francis Loraine Rooney b: 4-Jun-1908 baptized 7-Jun-1908 Vernon River, Prince Edward Island, Canada Vernon River
Rooney Joseph Roony b: 5 March 1887 Iona, Prince Edward Island, Canada
Rooney Denis Roony b: 29 March 1889 Iona, Prince Edward Island, Canada
Hope you have a great day!!!