Yuriy Lopatynsky nom de guerre Sheyk and Kalyna (born December 1906 in L’viv, died 1982) was a Ukrainian activist, soldier and a colonel in the Ukrainian Insurgent Army.
Son of a Greek Catholic priest, and a school colleague of Roman Shukhevych. He was an active member of Ukrainian Military Organization (UVO) and Organization of Ukrainian Nationalists (OUN). During World War II, he was a member of the Nachtigall Battalion headquarters (since 1941). As a representative of Ukrainian Supreme Liberation Council (UHVR), he took part in Polish-Ukrainian talks, between Polish Home Army (AK) and Ukrainian Insurgent Army (UPA) in 1945. After World War II, he emigrated to the United States.