A study from 2007 demonstrated a "strong genetic tie between Kurds and Azerbaijanis of Iran". The study further showed that the Azerbaijanis are "close to Iranian populations like Baloch and Iranians from Yazd, Gorgan Turkmen and Kurds.
Azeris are genetically the closest analysed population to Kurds and prehistoric people around Caucasus and North Mesopotamia.
Please read this, someone asked it here:
https://www.quora.com/Are-Azerbaijan...sians-or-Turks