This commit improves the name extraction for the db mode.
- if there is more than one valid name bit, the last bit will always be the last name
- name bits following the first bit recognised as a last name will not become first names again

This reverts commit c0ae74d.

This commit improves the name extraction by adding `db2` as an alternative mode.
- if there is more than one valid name bit, the last bit will always be the last name
- name bits following the first bit recognised as a last name will not become first names again