The Târnava (fully Romanian: Râul Târnava, Hungarian: Küküllő; German: Kokel) is a river in Romania. It is formed by the confluence of the Târnava Mare and Târnava Mică in the town of Blaj. The Târnava flows into the Mureş River after 28 km, near the town of Teiuş. Tributaries of the Târnava, besides its two source rivers Târnava Mare and Târnava Mică, are the Tiur, Izvorul Iezerului and Secaş from the left and the Şoimuş from the right.
The name Târnava is of Slavic origin, from trn, meaning "thorn".
The Hungarian name Küküllő is of Old Turkic origin from Kukel meaning sloe, and is thought to be given by the Avars.
- Administrația Națională a Apelor Române - Cadastrul Apelor - București
- Institutul de Meteorologie și Hidrologie - Rîurile României - București 1971