I think the best place for you to look would be
www.familysearch.org PILOT program found under 'search records' top left of main page or
www.labs.familysearch.org I entered just the surname and left location blank, many records have the parents names.All the microfilm can be seen at any local LDS History Center and some libraries. See the locations of these on the main page.
There are 434 Pirani records, 6 in Ireland, the last being 1955 Dublin N. an Abigail A. Pirani FHL#257947 Vol.7 Pg.567
Most are Italy, some US immigrants from Italty.
The surname Pirani does not appear in the 1901 or 1911 Census
www.nationalarchives.ieThis is the County Kildare message board.
Annette Code
amateur assistance