Parse this person name:

Elena Tristan Waltrade Walderade, De Blesse, flourished 1509-1541
user
first_name: Elena
last_name: Waltrade Walderade
middle_names:
- Tristan
temporal:
- start: 1509
  end: 1541
  type: flourished
titles: []
extra_info:
- De Blesse
assistant