as in : Bloxwich, Droitwich, Dunwich, Fordwich, Harwich, Horwich, Ipswich, Middlewich, Nantwich, Northwich, Norwich, Prestwich, Sandwich, West Bromwich.
( why is Greenwich excluded from this list? )
https://en.wiktionary.org/wiki/wich
https://en.wiktionary.org/wiki/-wich
I guess Kellynch is unrelated.
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Sir Walter Elliot, of Kellynch Hall, in Somersetshire, was a man who,
for his own amusement, never took up any book but the Baronetage; there
he found occupation for an idle hour, and consolation in a distressed
one; there his faculties were roused into admiration and respect, by
contemplating the limited remnant of the earliest patents; there any
unwelcome sensations, arising from domestic affairs changed naturally
into pity and contempt as he turned over the almost endless creations
of the last century; and there, if every other leaf were powerless, he
could read his own history with an interest which never failed. This
was the page at which the favourite volume always opened:
"ELLIOT OF KELLYNCH HALL.