In many cases we cannot tell the first from the last name of an author, especially in different localization.
In many cases we have more than one author and Author field is very handy for completion of all authors.
Last name and first name entries sometimes make contributor's life hard and push back to wikimarkup copy-paste solution for filling in citations of missing fields.
Flexibility should be provided.
- checkbox for the contrinutor to declare if he/she knows, for the author, which part of the name is first and which is last, and suggestion, if possible, or switching to author field to fill in
- select the number of authors to fetch the needed fields to fill in