Balbalan

This town draws its name from an ancient practice. It was said that war parties coming from certain areas in northern Kalinga (probably, the ancient place of Salegseg) used to meet by a creek when mapping out their plan of attack against or when regrouping after attacking a certain village. Since they would always wash (balbal, in the local dialect) their blood-stained bodies and weapons in the creek, the place and its adjacent areas came to be known as Balbalan. Since its tribal war days, Balbalan has become one of the most peaceful place in Kalinga as dramatized by the selection of one of its ethnic sub-groups, the Salegseg.

https://en.wikipedia.org/wiki/Balbalan,_Kalinga