Have You Ever Entered Your Name in a Google Images Search?
Yes, almost every day (sometimes even multiple times a day)!

But absolute majority of image buyers unfortunately dont search by author's real name nor nickname.
Unless it is some BIG name in the stock industry.
Most of buyers always search (only) by keywords and phrases/short sentences containing (key)words describing images they are looking for.
So (long and ideally unique) descriptions, titles, and keywords (in this particular order) of your images play much more important role when you want to gain good visibility for your images to possible buyers. This is especially true in case of author's personal website.