Parish records in Delgany for births, deaths and marriages exist from 1660. They may be found online at the following link on the Representative Church Body Library: https://www.ireland.anglican.org/about/rcb-library/anglican-record-project/delgany-glendalough
There is a plan of the church yard with details and photographs of each headstone on irishgraveyards.ie. This is searchable. A detailed indexed map of the graves is also displayed in the church yard itself.