"Ireland Births and Baptisms, 1620-1881," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/F51S-FQY : accessed 15 Nov 2014), James Eakin, ; citing PRESBYTERIAN,DRUMBO,DOWN,IRELAND, reference ; FHL microfilm 0823750 IT 1.
John most likely stayed in NI rather than immigrate with the Family. There are records in Drumbo area for mid-late 18th Century for John Aitken in the same area and up through the 19th century.
