Hi there,
Thank you very much for your query to Ireland Reaching Out. I have been looking at Google Maps and I see there is a York Road and a York Terrace. It may have been one of these streets, or else it is a street which no longer exists (i.e. knocked down or name changed).
The different names and different dates of birth are very odd. It might be worth your while rechecking this through the General Register Office (GRO). Maybe the marriage cert is incorrect, or maybe it is from another family member.
Have you checked the census records for 1901 and 1911? These are freely available online and would not take you very long to check.
Please post this message on the Monkstown parish profile page here: http://www.irelandxo.com/group/monkstown-dublin
Kind regards,
Sinead Cooney