Categories under brand

For a client’s webshop in work clothes i’m using a seperate landing page for each brand. I’m using the yith brands plugin pro to give a brand to each product.

Now for the rest the products are sorted by categories.
I need to get a filter to sort the product categories within that brand.

I already added the categories manually in a filter preset, but is there a way to automatically get a list of categories associated to the brand?

I’m using the free yith ajax product filter

Thanks in advance

Shepp