And, Mario. I think that Silverstone is so named because of the nearby village of Silverstone. And it is so named because Mick Jagger once visited it, and his hair was quite white with age/drug abuse/sun bleaching etc.
LOL that's a cop-out! But I will keep my promise
Algarve
As you probably know the Sarracens from North Africa invaded the Iberian Peninsula in the 8th century and ruled most of it for centuries (in Portugal's case until the 12th century, a couple more in the south of Spain). Algarve, their last stand against the Portuguese kings, is where they stayed longer, and in fact the Portuguese kings after the cconquest always named themselves "King of Portugal and Algarve". Soooo, all this to say that the region's name comes from the old Arabic Al-Gharb that means "The West" (same as the current word Maghreb, meaning "West" and used to name the westernmost part of North Africa)
Portimão
That one is easier and predates Al-Gharb for another number of centuries, meaning that it endured and survived the sarracen era of occupation. The big natural bay formed where the city is was a safe haven for ships since the dawn of civilization and maritime mediterranium merchants began exploring into the west of Gibraltar (ultimately entering the Atlantic). The romans, when they arrived, called it "Portus Magnus" (self explanatory I guess), and the name stuck, although somewhat changed, for the last couple of millennia.
Back to racing, thanks for the clarification on pitstops, will tell raeggee. 👍