Can I trademark a name already in use but not trademarked?

Can I trademark a name already in use but not trademarked?

Using a name in commerce can establish "common law" trademark rights, even if the mark has not been officially registered with a government agency like the United States Patent and Trademark Office (USPTO). These rights are generally limited to the geographic area where the mark is actually used. To find these you can search in Google, Google Maps and Amazon (and other platforms). Therefore, if someone is already using a name in business, they may have common law rights to the name in their local area or region.