The name "Voiko" is an ancient Slavic male name formed with the diminutive suffix "-ko". This suffix is also found in other names such as Boyko, Daiko, Zhivko, Stanko, and others. The root of this name is the word "Voj-", which means "warrior". Similar roots can be found in two-root names such as Vojgost, Vojmir, Vojisav, as well as in names like Berivoy, Brzivoy, Mstivoy.There are also names beginning with a similar root, such as Vojilo and Voin. Researcher B. Struminsky notes that the name Boyko may have genetic ties to Swedish or even Dutch names, comparing it to the name "Oykö".In Ukraine and the surrounding territories, the name Boyko has been documented since the 15th century. For example, individuals named "Voiko" are mentioned in the city of Suceava between 1418 and 1423. In 1480, another mention from the same city states: "...bought from Boyko." In the 17th century, several patronyms derived from the name Boyko were recorded, including, in 1622, the patronym Vojkovich, and in 1649, the Cossack of the Kropyvnyansky regiment Krysko Voychenko. Additionally, in the village of Nizhne Selishche in the Khust region, there is a field named "Voykovo".In Serbia, the name Boyko has been in use since the 12th century.
