Name «Sidko»

The name "Sidko" is a Ukrainian male name derived from the adjective "sidy" (grey) through the use of the substantivizing suffix "-ko." Similar examples include the names "Bilko" and "Sirko," which originate from the adjectives "bilyi" (white) and "siry" (grey) respectively. There is also a record of Transcarpathian surnames from the 16th to 18th centuries such as Sidak, Sidey, Sidin, and Sidych. In Poland, similar surnames can be found: Sidok, Sidko, Sido, Sidowicz, Sidun, Sidak. In 1649, historical sources mention a Cossack from the Cherkasy regiment named Sidko Bereket.