She is named in her brother Adam Hoops’ will.110
Circumstantial evidence suggests that she and her brother were of Ulster-Scots origin. They were both Presbyterian and settled in the western frontier of Pennsylvania in an area that was overwhelmingly Ulster-Scot.261

Margaret Cummins, widow, late of Carlisle, PA; will dated 14 August 1779; probated 3 June 1782. Sister-in-law Elizabeth Hoops; my brother Adam Hoops; his son Robert Hoops in New Jersey; David Hoops in Virginia; and Adam Hoops all my land in Nova Scotia. My grandson Benjamin Cummins (whom I have kept and nourished since he was weaned) to receive land and mills on the Little Codorus Creek in The Barrens, York County, PA. If Benjamin should die without issue, then those lands go to the children of my brother Adam Hoops, deceased. My son Robert Cummins; niece Margaret Walker, one of the daughters of my brother Adam Hoops deceased. To the 6 children of my sister, late the wife of Joseph Evans, late of South Carolina, deceased. To the poor of Carlisle. To Rev. John Steel's meeting house in Carlisle. To Nancy Nisbit, my indentured servant, her freedom.
Executors: Robert Hoops of New Jersey, son of my brother Adam Hoops, deceased; Thomas Barclay, merchant, of Philadelphia, PA.
Witnesses: Charles McClure, Thomas Dickson and John Coulter.
(Source: Cumberland County, PA Wills; Books A, B, C & part of D; page 486)

Note: The Reverend Captain John Steel(e)’s meeting house was a Presbyterian congregation and John Steel(e) himself was apparently born in Ireland in 1715. His meeting house in the Conococheague Settlement (where Adam Hoops was a settler) was converted into a fort of sorts during the French and Indian War in 1755.