The foundations for LLC name availability, having said that, are the same for any other unregistered business names: They must be distinguishable instead of Earlier trademarked. So if you are looking to register John Smith LLC but that name is now taken, you'll need to opt for An additional name. https://training.mpsi.wayne.edu/users/147/files/5719?wrap=1&verifier=mw4xY0ASdHLDTCbqcQ30OQJ9EVD5g0Bl95rcbzpe