Re your comment that it was "surprising " that a name was not found in Griffiths Valuation, one needs to bear in mind that it was quite different to a Census, in which an attempt is made to list all the inhabitants.
In Griffiths, the only people listed for any one House/Property are (1) The Owner of the property, and (2) where the property is leased to a Tenant, only the name of the Person who signed the Lease.
So take a Fictional but Typical small farm holding, say Owned by a landlord called Lord Louth, and rented from him by the Keating family , made up of Grandfather Tom Keating, His son John Keating, wife Bridget, and 8 children. In the Census all 11 Keatings will be listed. In Griffiths , only 2 people are listed, the Landlord and Grandfather Keating.
And changes afterwards down the years are contained in the Valuation Office, Abbey Street, in Dublin, and can be seen only in person there. Changes were made by crossing out the old tenant and adding in the new one using coloured ink!!! The colour was different each year. These "Change books" are very delicate, and a project is underway to digitise them but it is only at pilot stage yet, and covers only 1 or 2 counties. And can still only be viewed in house.