What is the meaning of Wren?

Troglodytes troglodytes (Eurasian wren, type species and sole Old World species of the family Troglodytidae).

Any member of a mainly New World passerine bird family Troglodytidae; a true wren.

Any small bird of similar appearance to a true wren, such as a fairywren or scrubwren.

Alternative form of wrenne

Source: wiktionary.org