- any of numerous small, active songbirds of the family Troglodytidae, especially Troglodytes troglodytes, of the Northern Hemisphere, having dark-brown plumage barred with black and a short, upright tail.
- any of various similar, unrelated birds, especially any of several Old World warblers.
- a member of the Wrens.
- English architect.
- English novelist.
- any small brown passerine songbird of the chiefly American family Troglodytidae, esp Troglodytes troglodytes (wren in Britain, winter wren in the US and Canada). They have a slender bill and feed on insects
- any of various similar birds of the families Muscicapidae (Australian warblers), Xenicidae (New Zealand wrens), etc
- (in Britain and certain other nations) a member of the former Women's Royal Naval Service
- Sir Christopher. 1632–1723, English architect. He designed St Paul's Cathedral and over 50 other London churches after the Great Fire as well as many secular buildings
