Soderk (Southwark), Marlibon (Marylebone), Reding (Reading), Bister (Bicester), Sozbery (Salisbury), Frum (Frome), Worick (Warwick), Noridge (Norwich), Darby (Derby), and the various Gloster, Lester, Wooster
In my country, it was always pronounced as green-each. Only in this thread I realised it's written Green-wich and pronounced gren-each.
And I'm pretty sure I'll forget it quickly and just keep calling it green-each.
However, some Americans even have trouble with Glasgow (Glaz-go, not Glass-gow) and Edinburgh (Ed-in-burra, not Edin-bro)
I've heard some Americans pronounce it "Edin-bo-ro" which is entirely off.