In the 1930s a group of Ilongots families (also known as Bugkalots) settled at Sitio Muggay in a place known as the Insular Government Reservation. The group had Lakay Palkat, Lakay Palma and Lakay Bakras as their tribal leaders.
These Ilongots somehow coexisted with some Ilocano settles in the area; and they cultivated the land to raise corn, bananas, various root crop and vegetables.
In those days the area was infested with rats; and they nibbled at almost everything. The fruits and tubers of their crops were never spared from the rodent bites.
Soon the place became the bites wrought much damage to their produce. The Ilocanos had a word for it --- Kinuriban---meaning, something with a nibble. To illustrate, people would usually say they came from kinuriban or they were going to kinuriban.
As time went by the kinuriban got shortened to kinuriban, which was mispronounced by the Ilongots as Guribang
The name stuck in the minds of people; and so Guribang became the official name of the barangay when created as a legal and corporate entity.