Jean, your 1891 census entry and marriage etc. look spot on to me.

The correct family in the 1881 census (as opposed to the one I originally posted):
[FamilySearch.org]
Eliza KERMODE Head W Female 60 Ballaugh, Annuitant
Edward KERMODE Son U Male 26 Peel, Accountant
John J. KERMODE Son U Male 22 Peel, Civil Engineer
James KERMODE Son M Male 38 Peel, Elementary (School) Teacher
Source Information:
Dwelling 9 Athol St
Census Place German - Peel, Isle of Man, Isle of Man
Family History Library Film 1342344
Public Records Office Reference RG11
Piece / Folio 5597 / 29
Page Number 8

As Donna wrote, there are about 12 entries on the IGI for the children of Thomas Kermode and Eliza Cowley, German, with two other Alfreds (1848 & 1850, extracted entries) and a duplicate entry for Wm Alfred (Nov. & Dec. 1846).

Could be Thomas's burial:
KERMODE, Thomas, 58, Ger. 16 Aug 1877
[www.iomfhs.im/lawsons/burials/kermode_l.html]

Sue