Kifayatulllah is an Arabic name for boys and girls that means contentment that comes from God, meaning that the person is a gift from God that makes one needless of other things.
Kinani is an Arabic name for boys that means one who belongs to the Kinanah tribe, which is an Arabian tribe that Prophet Muhammad (peace and blessings of Allah upon him) belongs to.
Kourosh is a Persian name for boys that means like the Sun. Kourosh is the name of the founder of the Achaemenid Empire in Persia, who is known as Cyrus the Great in English.
Kumail is an indirect Quranic name for boys that means complete, perfect, mature, whole. It is derived from the K-M-L root which is used in many places in the Quran.