Google Search can show who wrote the review directly in the search results snippet. Google has this "reviewed by" rich result element next to some search results that names the author of the review.

Google is highlighting review content within its search results snippets for some queries that ask for reviews. At least, Google is testing this - since I cannot replicate it. In the example spotted ...

Google updates review snippet guidelines, recommending ratings include written reviews and author names. Google recommends ratings include written reviews and author names. Reviews must be visible and ...

Google updated its review snippet documentation to clarify that each review or rating in structured data should point to one clear target, reducing ambiguity. Google updated its review snippet docs to ...