Robert married Isobell Reoch in 1734 in Scotland, United Kingdom. Isobell (daughter of John Reoch and Margaret Haig) was born on 13 Mar 1715 in Lasswade, Midlothian, Scotland, United Kingdom; died on 30 Dec 1777 in Dalkeith, Midlothian, Scotland, United Kingdom; was buried on 1 Jan 1778 in Dalkeith, Midlothian, Scotland, United Kingdom. [Group Sheet] [Family Chart]

1. Robert Crabb was born in 1732 in Farnell, Angus, Scotland, United Kingdom; was christened on 19 Mar 1732 in Farnell, Angus, Scotland, United Kingdom; and died.
2. Alexander Crabb was born on 3 Apr 1754 in Dalkeith, Midlothian, Scotland, United Kingdom; was christened on 7 Apr 1754 in Dalkeith, Midlothian, Scotland, United Kingdom; died on 8 Mar 1805 in Dalkeith, Midlothian, Scotland, United Kingdom.