He married Charlotte Twisleton, daughter of Fiennes Twisleton.
Coat of arms of John Crampton
Notes
Posthumously granted by Sir Chichester Fortescue, Ulster King of Arms, on 14 April 1808.[6]
Crest
A demi-lion rampant Or holding in his paws a helmet Proper.
Escutcheon
Sable a helmet Proper between two lions passant guardant Or in chief a rose Argent seeded of the second barbed Vert (Crampton) for augmentation a canton quarterly Or and Gules in the first quarter a lion passant Azure (Say and Sele).
^"Alumni Dublinenses Supplement p187: a register of the students, graduates, professors and provosts of Trinity College in the University of Dublin (1593–1860) Burtchaell, G.D/Sadlier, T.U: Dublin, Alex Thom and Co, 1935
^"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 4" Cotton, H. p37: Dublin, Hodges & Smith, 1848-1878