Mathew Terrace is listed as having 3 dwellings and 11 residents in the 1911 census.

 In the 1901 census, it had two houses and a shop

There is no clear indication of the location.  There was a Mathews family which held leases for some property in the area, and there was a Mathews Court in Blackrock.  But I have not been able to locate this one