From Karūṣa, another son of Manu, came the Kārūṣa dynasty, a family of kṣatriyas. The Kārūṣa kṣatriyas were the kings of the northern direction. They were celebrated protectors of brahminical culture and were all firmly religious.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
करूषान्मानवादासन् कारूषाः क्षत्रजातयः । उत्तरापथगोप्तारो ब्रह्मण्या धर्मवत्सलाः
karūṣānmānavādāsan kārūṣāḥ kṣatrajātayaḥ | uttarāpathagoptāro brahmaṇyā dharmavatsalāḥ
SB 9.2.16