'Chidren with second wife, surname WHITE: ...
MARY, born Mendon, MA 29 November 1711 (MVR, 211); living 1750/1 (birth of child); marriage intention 5 August 1733 JACOB ORMSBY, born Rehoboth 24 February 1710/1 (RVR 1:693), son of Jonathan and Mercy (Abbie) Ormsby.'
[Note: this Jacob's children are born to Jacob and Mary, the child in 1750/1 is for Jacob Jr. and Mary, a different couple (Jacob Ormsbee and Mary Barney), so the living date is not relevant.]