Hadrian's Wall and the Whin Sill 2 - Secret Places, Hidden Histories of Northumberland

[@farmstyle92macd55]

Am here looking for whin bushes in Scotland and find this are the names related

[@Reelion]

I think 'Whin' here was used to describe the nature of the rock (dark and hard), while 'Sill' the shape of it. I haven't heard of the bushes you mentioned, but if they grow around hard rocks, it might be related, I think :)