Parse this person name:

Manon Y. M. D. U. Rey le Grand, ca. 1241-1297
user
first_name: Manon
last_name: Rey
middle_names:
- Y.
- M.
- D.
- U.
temporal:
- start: 1241
  end: 1297
  type: life_span
titles: []
extra_info: []
assistant