The name Vishyak is currently not in use in Ukraine, and the distorted records that have reached our days, such as Vishak, attest to its usage not as a personal name but more as an additional identifier of a person. During the 15th to 18th centuries, this name was used as a surname or a surname-name. For example, Johannes dieto Wyesczak is mentioned in 1491, in 1461 there is a witness Visczak Agoston from the city of Mukachevo, and in 1704, a serf named Viscsak Olexa from the village of Zniatcovo is noted.Overall, Vishyak is a Ukrainian derivative formed using the suffix -ak from the ancient Slavic diminutive affectionate name Vyshko, which in turn originates from the two-root name model Vysheslav or from related Carpathian names such as Vishka or Vyshkivtsi.