A Page name is a search term
Most people reach a Facebook Page by searching for it or by seeing a post from it in a feed. In both places the name is the first thing they read, usually next to a 320 x 320 profile picture shown much smaller. Clear beats clever: the business name, then what it is or where.
That is why the form asks what your Page is about. "Family-run plumbing in north Bristol" gives the AI the trade and the town, and many ideas will carry one or both.
Choosing between the ideas
Read each name next to its reason and ask whether a customer would recognise you from the name alone. Then look at length: long names are cut off in some places, such as notifications and search results on phones.
When you have a favourite, check the matching username. If facebook.com/rosasbakery is taken, a name with a place in it ("Rosa's Bakery Leeds") gives you a natural username too: facebook.com/rosasbakeryleeds.