There's no owner(s) of the properties shown on the 1901 building return, but given the name and area involved I would suspect they were part of the Pembroke estate - i.e. Fitzwilliam Family. They owned large amount of property in Dublin, including much of the Donnybrook and Ballsbridge areas.
There are a number of other sets of Pembroke Cottages in Dublin city and suburbs e.g. several in the city centre, two sets in Donnybrook and more out as far as Dundrum and Blackrock.
I haven't found the cottages in 1911 yet - but will post here when/if I do..
Shane