Parse this person name:

Bernad Mercader, Poncio Z. Aitor D. Pepe Rebeca Z. Aitor D. Pepe Rebeca
user
first_name: Poncio
last_name: Bernad Mercader
middle_names:
- Z.
- Aitor
- D.
- Pepe
- Rebeca
temporal: []
titles: []
extra_info: []
assistant