The Ks of Medieval names

Female:

Kalisfena (Russian, Slavic): Form of Greek name Kallisthena (beautiful strength/power), from roots kallos (beautiful) and sthenos (might, power, strength, ability). Obviously, this is also the source of the word “calisthenics.”

Kanza (Moorish Arabic): “Treasure.” The modern form is Kenza.

Katixa (Basque): Possibly a form of Katherine.

Kedruta (Czech)

Kela (Yiddish)

Kokachin (Mongolian)

Kometitza (Basque): Possibly related to Medieval English name Comitessa, from Latin word comitissa (countess).

Kosenila (Russian, Slavic)

Kostantzia (Basque): Form of Constance.

Kristāna (Baltic): Probably a form of Christina.

Male:

Kaldor (German): Derived from Ancient Germanic name Chlodochar (famous army), from roots hlud (famous) and hari (army). Its best-known modern form is Lothar.

Kanutus (Swedish): Form of Knut, from Old Norse word knútr (knot).

Kartoka (Anglo–Scandinavian): Form of Kár-Tóki, from Old Norse root kárr (“curly-haired” or “reluctant, obstinant) and nickname Tóki (for names containing the element Þórr [Thor], “thunder”).

Kelagast (Slavic): The name of a 6th century nobleman. I couldn’t find a root for the first element, but the second seems to come from gost (guest).

Kelitia (English)

Khutughtu (Mongolian): “Blessed.”

Khuwaylid (Arabic): “Immortal, eternal,” from root ḵalada (to last forever, to be everlasting). This was the name of Prophet Mohammad’s first father-in-law.

Kitan (Silesian–German): Nickname for Kristian.

Kitman (Moorish Arabic)

Könika (Swedish): Nickname for Konrad, which descends from Old High German name Kuonrat. Its roots are kuoni (strong, brave, bold) and rât (counsel).

Korp (Swedish): “Raven,” from Old Norse word korpr.

Kovals (Baltic, Livonian): Possibly related to Livonian word koval (smart) or Slavonic kowal (blacksmith).

Kresimir (Slavic): “Spark of the world” and “spark of peace,” from roots kresu (spark, light, rouse) and miru (world, peace). Modern forms are Krzesimir (Polish) and Krešimir (Croatian).

Külüg (Mongolian): “Hero.”

Kürşat (Turkic): “Hero, valiant, brave.”