eswarar

The lingam (an iconic representation of Shiva) got a from forest in the region by asuras (demons)

1. Onan 
2. Kanthan
3. Jalandeeswaran, 

The three shrines in the temple, each dedicated to

1. Onakantheeswarar, 
2. Salantheeswarar and 
3. Jalandeeswarar are 

the respective shrines built by demons.

https://en.wikipedia.org/wiki/Ona_Kantheeswarar_Temple
https://www.youtube.com/results?search_query=Ona+Kantheeswarar