Someone already trademarked your dream name😭
There is still hope🙌
It depends a lot on the name. Some names that have been around for a long time may have extra protection, but most have standard protection. Meaning that you can still register the same trademark, as long as it is not in the same or competing categories.
Very generic names may not even be able to get protected.
Whatever you do, don’t name your company “McAllan”. It’s already taken 🌭
Danish hotdog seller beats McDonald's - UPI Archives
Besides the legal stuff, you should think about costumer confusion. Remember when Covid came and Zoom’s shares skyrocketed? Well so did Zoom’s. Confused? The wrong Zoom
That was investors, but happens with customers too.
We can support you to get your name trademark registered across the globe.