Tayum

Records show that Tayum got its name after the indigo plant which was commonly known to the Ilocanos as Tayum-Tayum. There was a time when indigo flourished in Tayum, then a source of wealth to the Ilocanos. In Barangay Deet, half kilometer away from the town proper, there was a big vat (Pagtimbugan) used in decaying the plant into a blue-black dye called ngila. The dye was used to color yams of cotton. At the beginning of the century, however, a powder dye from the Aniline Factories of Germany came into popular use among Ilocano weavers, causing the death of the indigo industry.

https://en.wikipedia.org/wiki/Tayum,_Abra