Osadchuk
Osadchuk is a Ukrainian surname. It is derived from the Ukrainian word "осадчий" (osadchy), which historically referred to a person who settled or founded a new settlement, often a military settler. The term can also relate to someone who was responsible for the upkeep or management of a fortified settlement or a town. As a surname, it likely originated from an ancestor who held such a position or was associated with the act of settling new territories.
Variations in spelling may exist due to transliteration from Cyrillic to the Latin alphabet. The surname is