If he is the John Murray who married Mary Boyles in Norfolk I would be sceptical of the Trees that name his Parents as the ones you have.
John/Mary bapt Wells -next-the Sea;
MARY 27 Dec 1753
ANN 30 Apr 1755
JOHN 8 Sep 1756
ELIZABETH 30 Oct 1757 buried 15 May 1762 age 4
VALENTINE 17 May 1759 buried 19 Oct 1761, infant
CHARLOTTE 22 Sep 1761
ELIZABETH 26 Apr 1763
JAMES VALENTINE and GEORGE WILLIAM 2 Jun 1764, Twins
ELLEN BENNETT 14 Jul 1765
ROBERT 15 Nov 1766
CHARLES 10 Sep 1768
On some bapts John is Dr John Murray
There is also a WILLIAM buried 1 Apr 1771 son of John/Mary
So I would say Trees that have John Murray and Ann BENNETT as his Parents may be more correct.
Trish