Peaky I’ve never heard before, so it’s gotta be a UK slang expression of some sort. Blinders in the US are just anything that keeps you from seeing (makes you „blind“). There are some idiomatic expressions with blinders, like „he’s got blinders on“, which is he refuses to or can’t see the obvious. And then there’s of course the literal blinders, those black little things you put on a horse so the horse can’t see from the sides. Sorry, but that’s all US English has to say about those words. So, I’ll have to defer to UK board members for other meanings.

I'm afraid I can't help you translating the name. The only part of your question I can help with is this part: "Blinders in American English means the same as Blinkers in British. Is it true?" Yes, it seems to be true, although I didn't know until now that British and American English used different words for these things! In American English, a "blinder" is something that obstructs your vision. You can put "blinders" on a horse so that it will only see what is in front of it (the side view is blocked). Some people also call the visors in the front part of a car "blinders" (you can "put the blinder down" to block out the sun, if bright sunlight is making it hard for you to see the road clearly). On a side note: In American English, a "blinker" is the turn signal on a car, which blinks to show you that the car is about to turn. We use "blinker" to mean a light that blinks, not a screen that blocks vision. Hopefully someone who knows more about UK English (or the show, which I haven't seen) can help you with the other meanings!

I do not know for sure, but we often add a 'y' to the end of words with informal names or with slang. I assume that 'peak' refers to the peak of the caps and we would turn this into 'peaky' when we add another word to create a name. We say 'telly' for the television and 'chippy' for the chip shop. A person called Pete who loved football might be known as 'footy Pete'.

https://en.wikipedia.org/wiki/Peaky_Blinders#:~:text=The%20Peaky%20Blinders%20were%20an,of%20lower%20to%20middle%2Dclasses. says "Peaky" is probably a reference to the peaked flat caps the gang wore, according to Birmingham historian Carl Chinn.[1] "Blinder" was a familiar Birmingham slang term (still used today) to describe something or someone of dapper appearance.[2] A further explanation might be from the gang's own criminal behaviour: they were known to sneak up from behind, then pull the hat peak down over a victim's face so they could not describe who robbed them.[3][4] . So peaky as you suggest and bliners as littler to blind.

Cześć Patryk. I've heard a few explanations for the name. One is that the peaked caps worn by the gang (known as peakies or peaky, singular) had razor blades sewn into the peak. When headbutting a victim, the blades could cause blindness.