Most of the details on RootsIreland are parish records, you usually get more detail on certs - i.e. civil records. Research certs cost €4 - so only about the same as a transcript of a parish record. Most of the records on RootsIreland only go as far as about 1900 ... so probably would not have this record ...
There are two Cullen households in Barnacullia in 1901 - no sign of Bridget, but a good possibility for Matthews family :
Cullen householdIf the family stayed in the same area, and Bridget died quite young then there's this
possible match for her death :
Name: Bridget Cullen
Registration district: Rathdown
Event type: Death
Quarter and year: Jan-Mar 1914
Age: 29 (est. year of birth 1885)
Volume: 2 / Page: 727
Shane