Didko is a name that likely originates from the diminutive form of the name Dido with the addition of the suffix -ko. In this case, "Didko" takes on the role of a familial name or a neutral nickname. For example, in a document from 1420, it mentions: "the faith of Lord Ivan Diedko" in the town of Suceava (from the SSUM dictionary I 340), and there is also the surname Didko among the Bačka Rusyns.In addition, one can mention the Transcarpathian toponym Ditskovytsia, located in the region of Volovets, as well as the patronymic Didkovych, which dates back to 1415 and originates from the city of Kyiv (Tup 541). A polonized form of the name Dzedkoy also appeared in the 15th century in Galicia and Lviv (Szulowska 19).