Root form: Piaras
Irish-language surnames
Mac Piarais, Mhic Phiarais, Nic Phiarais
Male form
- Nominative
- Seán Mac Piarais
- Genitive
- Sheáin Mhic Phiarais
- Vocative
- a Sheáin Mhic Phiarais
Wife form
- Nominative
- Síle Mhic Phiarais
- Genitive
- Shíle Mhic Phiarais
- Vocative
- a Shíle Mhic Phiarais
Daughter form
- Nominative
- Síle Nic Phiarais
- Genitive
- Shíle Nic Phiarais
- Vocative
- a Shíle Nic Phiarais
English-language surnames
- Pierce