Two trees on Ancestry have his parents as mentioned above by Carole, going back to Thomas Mingay, 1730-1812, in Westley Waterless, Cambridgeshire, and Sarah Gregory, 1731in Kirtling-1779 in Westley.
His mother's line varies on the trees but also goes back to the same Thomas and Sarah, via a marriage between Josiah Claydon, b 1835, and Elizabeth Mingay, b 1837.
One tree goes back further but not with precise details.
On the 1921 census, the family is transcribed incorrectly as Clayton, but is Claydon. Correct as Claydon in 1939.
David