The 1871 census has one John J, parents William & Margaret.

1871, Douglas, district 7, schedule 49, 60 Duke Street
William Kewley, head, married, 43
Margaret, wife, married, 45
Margaret H, daughter, unmarried, 19
Ann J, 14, unmarried, scholar
William R, son, unmarried, 11, scholar
Elizabeth E, daughter, unmarried, 10, scholar
John J, son, unmarried, 8, scholar
Lucy Quay, mother in law, widow, 69, retired

Birth place for all given as IoM

In 1851 William Kewley, 23, was visiting at John & Louisa Quay (nee Crain).
Also visiting was Margaret Christian, 25, a servant.