In many places they cut down forests (felling) and treated the soil by grubbing up and burning (radiation); they turned it into agricultural land. The settlement of Poruba was established by felling forests that once belonged to Veličná. It was founded sometime in the first half of the 14th century by a stream which in 1347 was called Jablonpataka (Jablonový potok). According to him, it was given the name Jablonov, which was the first name of Poruba. In 1350, the locality of Jablon is mentioned. The name Poruba was first mentioned in 1393, when the mayor and lord of Orava Ladislav of Opole issued a privileged deed for Šoltýs of Poruba, Ivan's son from Veličná called "Ivagnovicz". In 1420 Poruba is again mentioned under the name "villa Jablonowa", in 1422 the court of Orava County confirms that Michal "šoltýs de Jablonowa" bought and paid the šoltýstvo in Poruba to Tomáš, called "Ivagnowice" from Veličná. The name Poruba has been used continuously to the present day at the latest since 1547, when a tax (portal) inventory was issued for the municipality of Poruba.