1881 census
John Callow head, age 25, born Lonan, baker, Wesleyan local preacher
Annie wife, age 24, born Laxey Glen, Lonan
baker's wife
both living at 13 South Quay Braddan
1825 Lonan

1901 census in Everton mentions Emily Cubbon a sister-in-law to John Callow above

Anne Cubbon chr. 19 July 1861 Lonan, parents Henry Cubbon, Margaret Kermode

John Callow chr. 24th Nov. 1855 Lonan parents John Callow, Esther Corlett

1861 census
John Callow age 5 born IOM grandson of Edward Corlett age 60 and Elizabeth age 58

possible parents of John Callow the baker:

1) John Callow chr. 23rd Oct. 1825 Lonan, parents Philip Callow and Catherine Cannon
2) John Callow chr. 28th Nov. 1824, Lonan parents James Callow and Isabella Cowin

Distantly related to Philip Callow. Haven't established a connection to James Callow above.

Is this the John Callow that you are researching?