The name "Mylko" is formed as a diminutive from the root "Myl-", which means "dear, beloved," using the suffix "-ko." The formation of this name could have been influenced by such dual-root names as Bohumyl, Bratomyl, Duhomyl, Radomyl, and others. The earliest records of this name originate from southern Bukovina and central regions of Ukraine. For example, in 1421, it is mentioned: "Ivanko Levych and his brother Fedor and Mylko..." in the city of Suceava; in 1552 - Mylko Perkovych in Kyiv; in 1565 - Mylka Holovatska; in 1649 - Cossack Mylko Pavlenko from the Korsun regiment.The name "Mylko" was also used in Belarus. In 1552, it was recorded: "Ivan Chernyshovich, Mylko bratyeho" in the city of Mozir. The name "Mylko" appears in Polish records from the 16th century (as Milko) in documentation from ancient Galicia and Lviv lands.Patronymics were also formed from the name "Mylko." For instance, in 1692, there is a mention of Jan Mylkovych - a landowner from Kyiv.