Name «Oleiko»

Oleiko is a name that appears in historical sources. In 1552, a peasant from Cherkasy named Oleiko Ruda-kovych is mentioned under this name along with his patronymic. The word "Oleiko" may be unlikely connected to the noun "oil." More plausibly, this name is the result of a scribe's error, who recorded it as Oleiko instead of Ileyko, which is its more realistic form.