Civita (It.), Ciudad (Sp.), 'a city;' as Civita Vecchia ('old city'); Ciudad Rodrigo ('city of Roderick'). [From L. civitas.]
Clach, Cloch, Clough (Gael.), 'a stone;' as Clackmannan, Clogher, Auchnacloy, Clonakilty.
Clachan (Gael.), 'a village,' often also 'church.' There are perhaps twenty clachans in Scotland.
Cluan, Cloon (Gael.), 'a meadow;' as Clunie, Clonmel, Clontarf, Clynder.
Clyd (Celt.), 'warm,' Clyth (Celt.), 'strong;' as Clwyd—most prob. not Clyde.
Cnoc (Gael.), 'a knoll,' 'hill,' as Knockmeledown. Sir Herbert Maxwell (Studies in the Topography of Galloway, 1885) gives 220 Knocks in Galloway alone.
Coed (Celt.), 'a wood;' Cotswold Hills, Chatmoss.
Coln (from L. colonia), 'a colony;' as Lincoln, Colne, Cologne (Köln). [See Colony in Dict.]
Combe (A.S.), Cwm or Cum (Celt.), 'a hollow between hills;' as Wycombe, Compton, The Coombs, Como.
Craig, Crag (Celt.), 'a rock;' as Craigie, Crathie, Carrick, Crick, Cricklade, Croagh-Patrick. See Carrick (above).