Hi,
Unfortunately, I don't think that's possible in DSpace at this time. Those Author fields in the "Browsing by Author" page are simple metadata values (as Browse by Author is simply letting you browse all Items by "dc.contributor.author" and/or "dc.creator" field values). So, those values do *not* correspond with Person Entities. That means there's no additional metadata values that can be displayed, as all "Browse" interfaces in DSpace just use simple metadata fields at this time (e.g. Browse by Title is browsing all Items by "dc.title", Browse by Subject is browsing all Items by "dc.subject", etc.)