| Kayo | From initials k.o. |
| Kayomars | Ancient Persian name meaning 'great lord' or 'noble king', derived from Kay and Omars. |
| Kayonga | A name meaning a gift from the earth. |
| Kayosh | A name meaning a joyful, happy spirit. |
| Kaypassen | Kaypassen is a Tibetan name meaning 'one who has reached the highest spiritual state' or 'enlightened one'. |
| Kayras | Kairos means 'opportune moment' or 'key moment' in Greek, but Kayras is likely a variant of Kayros, derived from the same root. |
| Kaysan | One who is wise. |
| Kayson | A name meaning son of the righteous. |
| Kayur | One who is full of radiance. |
| Kayush | A person of great happiness. |
| Kayval | Only; Absolute; Aloneness; Lord Krishna |
| Kayvalya | Only; Lord Krishna; Aloneness; Absolute |
| Kayvan | World, universe |
| Kayvishtasp | Kayvishtasp means 'wise and victorious' or 'wise and triumphant' in ancient Persian. |
| Kayzad | Kayzad is a Persian name meaning 'bringer of joy' or 'one who brings happiness'. |
| Kaz | Dim. of cassius |
| Kazashi | One who brings the breeze. |
| Kazatimiru | Commanding peace.;Commands peace. |
| Kazem | One who restrains his anger: well-tempered, cool, patient. Alternate spelling: Kazim, Qazim |
| KAZEMDE | A leader of the community. |
| Kazi | A person who is a hard worker. |
| Kazim | An eventempered man; Restrainer. Controller of anger. |
| Kazimah | One who controls her anger |
| Kazimierz | Declares peace. |
| Kazimir | Variant of Casimir: Bringer of peace; announcing peace. |
| Kazmer | Announcing peace. |
| Kazu | Dry Fruit; Cashew Nut |
| KAZUO | A harmonious, peaceful man. |
| Kazuya | One who is peaceful and calm. |
| Keagan | A thinker: fiery. Form of Hugh. |
| Keaghan | A small, fiery, ardent soul. |
| Keahi | The flames of a bright fire. |
| Keahn | Keahn is a variant of Kevin, meaning 'handsome' or 'noble' in Gaelic origin. |
| Keaira | Little dark one |
| Kealan | A slender and fair warrior. |
| Kealeboga | I am thankful to the Lord. |
| Keallach | A brightheaded warrior. |
| Kealy | A descendant of the slender. |
| Kean | One who is ancient and wise. |
| Keanan | Ancient and distant descendant |