Can I locate a sitter by using their name?

Rover's search doesn't allow you to do that. However, if you know their last name, you can try searching on Google. You would search for their first name and last name initial (like Maryann B), Rover, name of city/town. It often works that way.

When all else fails, then call Rover Customer Support at [Edit: Rover’s contact options have changed. Visit the Rover Help Center at https://support.rover.com/ to find the phone number, help articles, or chat with the team] for assistance finding this person.