The DEIMS person content has a Associated Biblio Author field. In order to populated this field I created two data export views:
1) I exported a csv file of "Author id","Author full name","Author last name", "","","Person Name","Email","Nid","Title" (note that the Person Name is the from the person content referencing that Author id)
2) A csv file of "Nid","Name","Last Name","Associated Biblio Author" from the person content
Then I use Excel to try and match a "Author last name" to a person "Last Name" and of course you need to edit it to check for a correct match. Once I had a csv file with the matched names, i.e. "Nid","Name","Last Name","Associated Biblio Author" I then use feeds to import the file back in.
Note: You may need at least Feeds ver 7.x-2.0-beta1 See Use other field as an unique target in Feeds for details.
Below are links to the export views, feed importer and Excel files.
Person Associated Biblio Author view