Parse this person name:

Leroux Valentin, Léon Étienne Thierry, 1616-1637
user
first_name: Léon
last_name: Leroux Valentin
middle_names:
- Étienne
- Thierry
temporal:
- start: 1616
  end: 1637
  type: life_span
titles: []
extra_info: []
assistant