Parse this person name:

Allain, Frédérique R. Y.., Sainte Alix (1495-1557)
user
first_name: Frédérique
last_name: Allain
middle_names:
- R.
- Y.
temporal:
- start: 1495
  end: 1557
  type: life_span
titles: []
extra_info:
- Sainte Alix
assistant