Proto-Baltic: *teterw-ā̂ f., *teterw-a- m., *tetirw-ā̂, -iā̃ f., -ia c., *teter-ia- m.; *tī̂tar-a-, *tī̂ter-a- , -ia- (1) c.
Meaning: heath-cock, grouse
Old Lithuanian: tītara-s 'Truthahn'
Lithuanian: tetervà `Birkhenne, -huhn, Tetrao tetrix', dial. tetrava-s `Birkhahn', tetirvà `Birkhenne', tetirvē `Kronwicke, Schaflinse', tẽtervina-s `Birk-, Auerhahn'; tytara-s 'Truthahn'
Lettish: teteris, tetēris, tetîris2 (< *tetirvis ?), tętęrę̄ns `Birkhuhn'; tĩtars, tĩtęrs, tĩteris 'Truthahn'
Old Prussian: tatarwis `Birkhuhn' V. 767
