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Probably the family of Edward Jones.
Edward Jones (Second row, far right) had three sisters: Molly, Katherine and Annie (Front row, standing, seated on her mother's lap, and standing next to her father) Katherine Jones ODonnel, born 9 Aug 1871 and died 25 Dec 1946, Molly Jones McGann born 21 Mar 1876 and died 20 Jun 1953.
The others in photo would be parents Rosanna Blundin and Jonathon Jones (seated, front row) and unknown third adult (back row, middle). John was born about Nov 1838 in Lancaster area and Rose was born 11 Nov 1838 in Loretto. Rose died 30 Mar 1907 and John possibly died 26 Apr 1904. They were married 13 May 1866 in McKees Rocks. The family lived in Glendale.