Thai
Internet search shows “Happy Bowl” is mebtioned several times as a Thai restaurant.
Also check the internet - Suthamtewakul isn’t such a rare name, there are other people going by that name, and they are Thai.
Thailand has a minority of Muslims too, but the Thai ones tend to have Islamic elements in their names.
My money is on mooslime. Its just too coincidental with all that is going on in the world and the USA.