The original settlers of San Quintin were called the "Ubilaos", believed to be a fierce and man-eating tribe who inhabited the place at the close of the 17th century. When the Philippines was under Spanish Regime, failing to convert them into Christianity, the Spanish soldiers and missionaries who went to the place had to left it and once more rendered it uninhabitable.
During the close of the 18th century, there was an exodus of immigrants from the coastal town of Ilocos Sur and La Union to the town. The "Ubilaos" and the other minority tribes were out witted by the new comers who forced them to evacuate to the hinterlands of the town.
Historical records show that the first settlers of the municipality were successfully unified by Don Quintin Lictawa. The union of these settlements paved the way for the town's creation.
Upon the establishment of San Quintin, the naming of the different barrios followed. Likewise, to take care of the spiritual needs of the people, the place was established as the Saint Paschal Baylon Parish in 1876.
The Ilocano settlesr of the town who came from Sta. Maria, Ilocos Sur and Bangar, La Union brought with them their beliefs, customs and traditions. They were protective, visionaries and clannish. Their settlements established mostly along roads and near their farms were eventually named by them from the name of the towns where they came from such as "Casantamaria-an", "Cabangaran", and some named them in honor of great leaders and saints like "Gonzalo" and "San Pedro", some from the products of their place like "Alac" from their favorite native wine called "arak", "Lagasit" from the words "laga" (to weave) and Si-it (thorns), Calomboyan from the presence of Lomboy trees, Carayacan, from being traversed by a "Carayan" (river).
Some of the old socio-cultural traits in the Ilocos were also handed down to succeding generations like: belief in supernatural deities, dwarfs, and anitos offering; superstitious practices like singing while cooking would lead to one marrying an old man; and customs and traditions like kissing of the hands (mano) to show respect to the old and parental arrangement in marriage. Some of these practices, however, have vanished with the influence of Spanish, Japanese, American and other foreign cultures.