This publication lists all the Ministers of the
Established Church of Scotland
and the (re-formated) entry for John Kerr reads thus:
JOHN KERR born Harris, 25th Oct. 1855,
son of Roderick K. and Christina Kerr;
educated at Borve School and Univ. of Glasgow;
licen. by Presb. of Dunoon July 1892;
assistant at Greenock;
ord. to Shurrery 28th Feb. 1904;
trans, and adm. 14th Sept. 1910.
Marr. 30th April 1918, Adele, daugh. of Elie Le Couvey.
I am pleased by this for not only does it act as confirmation
of the results of my previous investigations, but it also helpfully
gives us his date of birth and the significant dates
in the progress of Ayatollah Kerr's career.
Source: National Library of Scotland:
(Note: A search for 'Ayatollah' on the blog will reveal a further dozen entries that refer to him)