Person.firast_name .last_name do not correctly encode the semmantic meaning of the name,. use given name and family name instead.

[bbappserver]

A person should have

class Person:
  given_name
  middle_names
  family_name
  family_name_suffix = charField(choices=ROMAN_NUMERALS)
  full_name #Usually blank, but contains name if other fields insufficient to encode
  nickname
  pseudonyms