As I understand it, High Wycombe is distinct from Wycombe Marsh which is further down the river, and from Chepping Wycombe which is further down again (and is presumably where the market happened, from OE cieping – any Scandwegians reading this may be amused to note that this is the same root as köping, as in Linköping. Although the river is the Wye and you might think Wye + combe, apparently that’s a backformation and it’s more likely to be Wic + hama, “dewllings”.
But anyway.
I actively endorse this and I plan to use it as a checklist in the next campaign I build. In particular, this may just be people I play with, but I think a bit of guidance as to the sort of characters who are likely to fit the campaign (whether in skills or personalities) may be quite welcome.