Kalyna is a rare name, derived from the Ukrainian word for a flowering shrub (Viburnum opulus, also called guelder rose).
Karyna is the Ukrainian and Belarusian form of Karina, which originated as a nickname for Katherine in its various forms.
Kateryna is the Ukrainian form of Katherine, which comes from Greek name Aikaterine and has a disputed etymology. It may come from another Greek name, Hekaterine, with the root hekateros (each of the two), or be derived from Hecate/Hekate (possibly from the root hekas, far off). It also may come from the Greek word aikia (torture), or a Coptic name meaning “my consecration of your name.” Eventually, it became associated with the Greek word katharos (pure), and the Latin spelling was thus changed from Katerina to Katharina.
Khivrya is a rare, archaic form of Fevroniya, which comes from Latin name Febronia and possibly derives from the Roman purification festival of Februa, held during the month of February. The Latin word februum means “purging, purification.”
Khrystyna is the Ukrainian form of Christina, which simply means “Christian.”
Konvaliya is the Ukrainian name for lily of the valley.
Kvitoslava means “flower of glory.”
Kalenyk comes from Greek name Kallinikos (beautiful victory).
Kazymyr is the Ukrainian form of Casimir, which comes from Polish name Kazimierz (to destroy peace; to destroy the world). A rarer form is Kazemir.
Kharyton comes from Greek name Chariton (kindness, grace). One of the nicknames is Kharko, which is also an older folk form.
Khrystofor is the Ukrainian form of Christopher (Christ-bearer).
Khveder is an older, phonetic form of Fedir (Theodore, gift of God).
Kindrat is the Ukrainian and Belarusian folk form of Latin name Quadratus (square).
Klyment, or Klymentiy, is the Ukrainian form of Clement, which comes from Latin name Clemens or Clementius (gentle, merciful). One of the diminutives is Klym.
Kostyantyn is the Ukrainian form of Constantine, which derives from Latin name Constantius. Its ultimate origin is the Latin name Constans (steadfast, constant).
Kypriyan is the Ukrainian form of Cyprian, which comes from Roman family name Cyprianos and means “from Cyprus.”
Kyrylo is the Ukrainian form of Cyril, which comes from Greek name Kyrillos and word kyrios (lord).
Kyy is a rare name which was borne by the legendary founder of Kyiv. It may possibly be derived from Proto–Slavic root *kyjь (hammer, bat, stick, club).