Cemetery

Both Willbrook and Ballyboden would have been in the Catholic parish of Rathfarnham, also known as the District of Rathfarnham, Crumlin, and Bohernabreena, but there was no Graveyard attached to the current Catholic Church at Rathfarnham, or it's predescessor nearby.

The Ballyboden and Willbrook area is now far more built up than it was in those days, but there are a number of old graveyards nearby, generally attached to Church of Ireland Churches or the sites of former churches where local residents of any faith could have had burial rights.  See below :

Rathfarnham Village, small graveyard adjacent to the ruins of the old church. (The town of Willbrook is in Rathfarnham civil parish)
Whitechurch - two graveyards, a very old graveyard on the site of an old church, and a newer graveyard attached to the current Church of Ireland. (Ballyboden was in Whitechurch civil parish)
Cruagh Old and New graveyards on the Cruagh road near the modern Mount Venus Cemetery in Rockbrook.
Another possibility is the Cemetery at St. Anne's Bohernabreena, although located quite a bit further to the south was originally part of the Catholic Parish of Rathfarnham.

see also the Dublin Graveyards Directory on the Dublin City Library website, which has details of the known graveyards and Cemeteries in Dublin City and County, along with a map.
 

Thank you very much.