Irish tanaí

← Proto-Celtic *tanawyos (inherited)

← Welsh tenau (cognate)

← Ancient Greek ταναός (cognate)

← Proto-Indo-European *ténh₂us (inherited)

← Latin tenuis (cognate)

← Old Norse þunnr (cognate)

← Old Irish tanaide (inherited)

← Old Irish tanae (mention)

→ English thin (cognate)