| Krux | A Latin term meaning a difficult crux. |
| Kshat | Derived from the warrior caste title. |
| Kshemi | One who is peaceful and secure. |
| Kshit | Refers to the earth or horizon. |
| Kuaray | A name meaning the bright sun. |
| Kuari | A name meaning a young maiden. |
| Kuiper | One who makes or sells barrels. |
| Kullu | Named after a beautiful valley. |
| Kulture | Represents arts and traditions. |
| Kulu | Derived from a sacred mountain. |
| Kuvempu | A famous Kannada poets name. |
| Kuwanlelengtakw | A bright morning star. |
| Kvasir | A wise being made of spit. |
| Kvothe | A name meaning to know well. |
| Kylo | Sky or heaven in Old English. |
| Kyraan | A small, darkhaired person. |
| Kyro | A name meaning lord or master. |
| Kythira | Named after a Greek island. |
| Kyusha | A name meaning precious gem. |
| Kyushu | Nine provinces of old Japan. |
| Kyv | A name meaning a small river. |
| Qai | A name meaning to be powerful. |
| Qavish | One who is full of wisdom. |
| Qen | A name meaning to be bright. |
| Qet | A name meaning to be quiet. |
| Qetesh | An ancient goddess of love. |
| Qiah | A name meaning God is mercy. |
| Qian | A name meaning to be modest. |
| Qirti | A name meaning to be honor. |
| Qori | A name meaning golden light. |
| Quame | Born on a Saturday morning. |
| Quark | A fundamental particle of matter. |
| Quartz | A hard crystalline mineral form. |
| Quasimodo | Meaning halfformed or shaped. |
| Query | A question or a formal inquiry. |
| Qui | The Latin word meaning who or that. |
| Quixella | A name meaning whimsical or odd. |
| Qyburna | A name meaning dark knowledge. |