What is "yaghuth"

Yaghūth (Arabic "He Helps" يَغُوثَ) is an idol referred to in the Koran (71:23) as a god of the era of the Prophet Noah:

And they say: By no means leave your gods, nor leave Wadd, nor Suwa'; nor Yaghuth, and Ya'uq and Nasr. ( Qur'an 71:23)

The name may be the source of H. P. Lovecraft's Yuggoth.