Apparently the original Brooks was born in Connecticut in 1772. I think this was before the era of Italian immigrants coming to the US and anglicising their names, but I could be mistaken.
When I was (much) younger I used to get my suits from a Jewish tailor on Roosevelt Road but covet the wares in both Brooks Brothers and the high-end Italian stores. Nowadays I mainly wear aloha shirts, but right-wing cultural appropriators are threatening to take that away from me.