'Pinner' probably means the pin-shaped hill, or the hill of a man called Pinn.
It ends in Old English ora, a slope or hill; the River Pinn was later named after the village. Pinner Fair has been held almost every year since a charter of 1336.
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Sources
- Pinner Wikipedia
- Pinner tube station Wikipedia
- How the Metropolitan line stations got their names Londonist
This text was written with the help of AI from the sources above and checked against them.