Hi Pat,

The Maughold parish register has this marriage:

23 Oct 1915
William CALLISTER 31 Bachelor Engine Driver, Holmleigh, Kk Michael, [father] Thomas Callister, Engine Driver, and
Annie May PALMER 21 Spinster Auckland Lane, Ramsey, [father] Albert Palmer, Sailor.

Anne May CALLISTER 31 yrs., Old Bank House, Laxey, Lonan, was buried in Maughold on 15 Mar 1925.

William CALLISTER, 74 years, Old Bank House, New Road, Laxey, buried in Maughold on 04 Jun 1958.

If you are a member of the IOMFHS you could ask the librarian to send you their MI[s] (likely to have one at those dates), which may give William's 2nd wife, and possibly children.

Sue