I found the following baptism record
Date: 15 December 1882
Area: Dublin: Church of Ireland; Parish St. Mark
Name: Mabel Evelyn Purcell Plunkett
Address: Claremont, Carrickmines
Father: Oliver Charles Plunkett
Mother: Emma Plunkett
Date of birth: 1882
I wasn't able to find any baptism record of the other children
Carrickmines