Hi,
You could create a brand filter via the menu Dispaly>Filters.
That way, you would have a dropdown at the top of the products listings where you could select a brand and then the system would filter out the products of other brands.
And once you use the filter, you'll see the URL of the page changing to include the filter parameter. That way, you could use that URL to directly access the filtered page. Finally, once you have that, you could also hide the filter area with CSS if you don't want the customers to use the brand filter that you've configured.