Ram Swarup Joon writes In the Sabha Parva, Mahabharata/Book II Chapter 48, while describing various Kings who attended a ceremony in the Durbar (court) of Maharaja Yudhisthira, seventeen names are mentioned which are today found as Jat gotras. These are Malhia, Mylaw, Sindhar, Gandhar, Mahity, Mahe, Savi, Bath, Dharan, Virk, Dard, Shaly, Matash, Kukar (Khokar) Kak, Takshak, Sand, Bahik (Bathi) Bije (Bijenia), Andhra, Sorashtra (Rathi) Mann, Ar, Sohat, Kukat, Othiwal (Othval).
Ram Swarup Joon writes.... According to Bhagwatdatta, Baluchis of (of Balochistan) today are the descendants of Anu. Baluchya, Balhara, Bal, Balan are Jat gotras. Kak, Kakarzai, Klock, Kukar, Khokar, Karskar Jats belong to the Anu Branch. Thirty thousand Baluchis in Makran were recognised as Jats. Baluchis of the Lomri region are described as Jats in their chronicles. In the Rig-Veda, there are references to the Kabul River of Afghanistan, Gomal Valley, and rivers Ganga and Jamuna. There are also references to Kshatriya and the five branches of the Yayati Dynasty.
Ram Swarup Joon writes that ... The Kak Jats have 52 villages in Aligarh district, and about 100 villages in other parts of India. These people called themselves descendants of the Nagas or Yadu and worship Balram. Their ancestors ruled over Anhalwara in Ajmer. On being driven out from there they settled down in Brij. They have 40 villages in district Gonda.
Ram Swarup Joon writes about Kukarnag, Kakrryan or Kak: Kukar was the son of Takshak. Kak, Kakrayan, Kakar, Khokhar are derivatives of Kukar. They are also called Karaskars. The Kukar rulers are also mentioned to be present at King Yudhisthira's coronation. They are called Kukars in Dwarika and Kakar in Baluchistan. Kakarzi amongst the Baluch is a big tribe. The Kukar dynasty has been erroneously called a Suryavanshi dynasty.
Rajatarangini mentions that when Sussala became King of Kashmir second time in 1121 AD he faced difficulties. There happened a disaster on the bridge over the Sindhu, king was defeated but Renewal of war continued. It is mentioned that Ananda of the family of Kāka, Loshtasha, Nala and other renowned warriors in the Damara army were killed by the king's (Sussala) soldiers. (VIII,p.94)
- No. 39. — Kākanāye Bhagavatopamona-lathi ; or
- " Gift of Kākanā, an anxious longer for Bhagavat."
The first King of Ayodhya was Ikshvaku whose son was Vikukshi. Vikukshi's son was Kakustha, who started the vansha Kak or Kakustha. They are mentioned in Vayu Purana. They are mentioned in Allahabad Pillar Inscriptions of Samudragupta, alongwith Khara, Salkalan, etc. - all Jat clans.  Their descendants are the modern Kakrana Jats.
Distribution in Uttar Pradesh
The Kak Jats have 52 villages in Aligarh district in Uttar Pradesh and about 100 villages in other parts of India. These people called themselves descendants of the Nagas or Yadu and worship Balarama. Their ancestors ruled over Anhalwara in Ajmer. On being driven out from there they settled down in Brij. Kak Jats have 40 villages in district Gonda. 
Distribution in Rajasthan
Villages in Sikar district
Distribution in Pakistan
According to 1911 census the Khak were the principal Muslim Jat clan in:
- Multan District - Khak (596)
- Dera Ghazi Khan District - Khak (556)
- Muzaffargarh District - Khak (1,822)
- Bahawalpur State - Khak (1,453)
Distribution in Afghanistan
- Kakkuka (861 AD) was a Kak clan ruler of Mandor in Rajasthan.
- Arjun Ram (Kak) - SHO Police, Date of Birth : 5-May-1961, VPO. Garh Taknet via- Ajeetgarh, teh- Shrimadhopur, distt. Sikar, Present Address : 102/100, Patel Marg, Mansarovar Jaipur, Phone Number : 0141-2781797, Mob : 9414073797
- B S Dahiya:Jats the Ancient Rulers (A clan study), p.239, s.n.105
- An Inquiry Into the Ethnography of Afghanistan, H. W. Bellew, p.113,117,118,158
- Dr Mahendra Singh Arya etc,: Ādhunik Jat Itihas, p.227
- An Inquiry Into the Ethnography of Afghanistan,H. W. Bellew, p.80
- Ram Swarup Joon: History of the Jats/Chapter II,p. 32-33
- Ram Swarup Joon:History of the Jats/Chapter II,p.32
- Ram Swarup Joon: History of the Jats/Chapter V,p. 89
- Ram Swarup Joon: History of the Jats/Chapter V,p. 91
- Kings of Kashmira Vol 2 (Rajatarangini of Kalhana)/Book VIII, p.46
- Kings of Kashmira Vol 2 (Rajatarangini of Kalhana)/Book VIII, p.94
- Jats the Ancient Rulers (A clan study)/Jat Clan in India,p. 258
- IA, Vol. II.
- The Bhilsa topes: Inscriptions, P. 241
- Vayu Purana, 4/2/14
- Indian Antiquity, Vol. II
- Bhim Singh Dahiya, Jats the Ancient Rulers ( A clan study),
- Mahabharata, 6 /9/64
- [Bhim Singh Dahiya]], Jats the Ancient Rulers ( A clan study), p. 285
- Rajatarangini of Kalhana:Kings of Kashmira/Book VII (i) (p.269)
- विश्वामित्रो ययौ अग्रे ततो रामो महायशाः ।
काक पक्ष धरो धन्वी तम् च सौमित्रिः अन्वगात् ॥१-२२-६॥ राज्य भार नियुक्तानाम् एष धर्मः सनातनः । अधर्म्याम् जहि काकुत्स्थ धर्मो हि अस्याम् न विद्यते ॥१-२५-१९॥ प्रभातायाम् तु शर्वर्याम् विश्वामित्रो महामुनिः । अभ्यभाषत काकुत्स्थौ शयानौ पर्ण संस्तरे ॥१-२३-१॥ श्रूयताम् वत्स काकुत्स्थ यस्य एतत् दारुणम् वनम् । एतौ जनपदौ स्फीतौ पूर्वम् आस्ताम् नरोउत्तम ॥१-२४-१७॥
- Ram Swarup Joon: History of the Jats/Chapter V, p.89
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