Must have been the sister of Henry Atkinson (the maternal grandfather of John Scot, Lord Eldon).
Assuming that Ruth Atkinson was the sister of Henry Atkinson, then we have a Henry bapt. 29 Sep 1670 at Gateshead, son of Henry Atkinson. So possible siblings:
- Simon, 1669
- Matthew, 1670 and Henry, 1670 (twins? baptised same day)
- John, 1673
- Joseph, 1675
- William, 1679
- Mary, 1680
The possible parents of this set of siblings might be Henry Atkinson and Elizabeth Hunter, who married 30 August 1668 in Durham (
https://familysearch.org/ark:/61903/1:1:NLZN-RXG)