A business name and a trademark are not the same thing. However, your description says you can find him on the Internet using the name to promote his business. That use gives him priority in Trademark law.
There will be other questions you find as you seek to open an e-commerce web site or App. In my experience, working with a lawyer as you begin will save you a lot of money in the future.
I have written a legal guide with issues you will need to discuss with an Internet attorney. I have placed a link here for your convenience: http://www.avvo.com/legal-guides/ugc/legal-steps-to-opening-a-new-e-commerce-website-app-or-blog
Answered on Jun 29th, 2021 at 10:49 AM