The parents' burials also appear to be listed on Brian's site:

Theresa McDONALD 52 Rus 24 Aug 1849
John McDONNALD 52 Rus 17 Mar 1851

IGI has

Teresa McDONALD (jnr) m William GLEDHILL. Maughold, 16 Apr 1865

This family is in Kirkdale, Lancashire in 1881 Census:
William W. GLEDHILL Head M Male 40 Port... County, Cheshire, England Boiler
Theresa GLEDHILL Wife M Female 35 Douglas, Isle of Man
Mary A. GLEDHILL Daur Female 13 Liverpool Scholar
John J. GLEDHILL Son Male 6 Liverpool Scholar
Samuel W. GLEDHILL Son Male 4 Liverpool Scholar
Source Information:
Dwelling 27 Barry St
Census Place Kirkdale, Lancashire, England
Family History Library Film 1341880
Public Records Office Reference RG11
Piece / Folio 3675 / 107
Page Number 37