The remote connection of the Achaemenids to the Kambojas and Kurus is indeed reflected in the royal name Kuru and Kambujiya/Kambaujiya which several of the great monarchs of the Achamenean line of rulers had adopted. Seeing close connections of the Kambojas (Parama-Kambojas), the Madras (Bahlika-Madras or Uttaramadras) and the Kurus (Uttarakurus) which tribes were all located in/around Oxus in Central Asia in remote antiquity, it can be thought that the Kurus, the Kambojas and the Parśus were a related people.Kambujiya” or “Kambaujiya” was the name of several great Persian kings of the Achaemenid line. This name also appears written as C-n-b-n-z-y in Aramaic, Kambuzia in Assyrian, Kambuza, Kambatet/Kambythet (rather Kambuzia ) as well as Kambunza in Egyptian, Kam-bu-zi-ia in Akkadian, Kan-bu-zi-ia in Elamite, and Kanpuziya in Susian language.
Scholars further believe that these invading Euroasian nomads were Scythian tribes from the “Cyrus” (Kurosh) and “Cambyses” (Kambujiya) valleys, around the “Cambysene” province of Armenia Major in the west of the Caspian region. Strabo’s Geography attests Cambysene (the Latin form of the Greek Kambysēnē) as a country and mountainous region and makes it one of the northernmost provinces of Armenia, bordering on the Caucasus mountains.through which a road connecting Albania and Iberia passed.Strabo also attests a large river Cyrus (Kurosh),which according to Mela, rose from Montes Coraxici (main chain of Caucasus)and flowed from Iberia to Albania in nearly a south-east course. Cambyses (Kambujiya), modern Yori, Jora, or Gori another river rising in the Caucasus or according to Mela, in the Coraxici Montes flowed through the province of Cambysene and fell into the Cyrus (Kurosh) after uniting with the Alazonius (Alasan) a little distance away. Province Cambysene got its name from river Cambyses. A close reading of Strabo suggests that Cambysene stretched approximately from the Cyrus river on the west to the Alazonius river on the east.
Ptolemy and Ammianus Marcellinus also mention two rivers called Cyrus (Kurush) and Cambyses (Kambujiya) flowing through Media Atropatenein in easterly direction and falling into the Caspian sea—river Cyrus falling between Araxes (Aras) and the Amardus (Sefid Rud) and if the order of Ammianus Marcellinus be correct, then river Cambyses (Kambujiya) would seem to have been closer to the Amardus (Sefid-Rud) and falling into Caspian at Rasht (in Gilan province). In the Epitome of Strabo a nation of the Caspians is spoken of περι τὀν Καμβύσην ποταμόν (Kambysen—Kambujiya?).
Stephen of Byzantium defines Kambysēnē as a Persikē khōra (Persian country) and relates the name to Achaemenid king Cambyses (i.e. Kambujiya). The Greek form of the name i.e. Kambysēnē, must have been derived in the Hellenistic period from an indigenous name, corresponding to Armenian Kʿambēčan, with the common ending -ēnē. In Georgian it is written Kambečovani, in Arabic Qambīzān. In Sanskrit, it is believed to have been transliterated as Kamboja. Though not attested prior to Strabo, the region Cambysene and the rivers Cyrus and Cambyses are believed to have born these name since remote antiquity.
The territorial name Cambysene (Gk. Kambysēnē) as well as the river names Cyrus (Kurosh) and Cambyses (Kambujiya) occurring in Strabo’s Geography and Pliny’s Histoires on north of Iran (1) in Media and (2) in Armenia Major as also the ancient ethnics inhabiting therein may be related to the ethno-geographical name Kambuja/Kamboja and Kuru of the Sanskrit texts. According to Ernst Herzfeld also, Cyrus and Cambyses, the names of two rivers, as well as the Achaemenid names Kurosh and Kambujiya were derived from Kuru and Kamboja tribal people as referred to in the Indian texts.t is very probable that before leaving the Caspian region for Iran/Afghanistan and North-west India in the wake of volker wanderung of the 9th/8th centuries BCE, these Caspians people (=Cambusene) may have been living as single tribe spread over the valleys of Cyrus and Cambyses in Armenia. But after migrating southwards to Indian sub-continent, they probably split-up into two distinct clans i.e. Kurus and Kambojas and first settled (1) in Trans-Himalayan region as Uttarakurus (Sikiang) and Parama Kambojas (Pamirs/Badakshan) and (2) later also moved to cis-Himalayan regions as Kurus (in South-Esat Punjab/Kuruksetra) and Kambojas (in south-west Kashmir/and in Kabul valley). In the Kurukshetra war, the Kurus and Kambojas are seen as very closely allied tribes. However, while referring to the classical names “Kambysene” and “Kambyses”, the German scholar Friedrich Spiegel speculates that the Iranian Kambojas had probably moved from the Indus-land (Kamboja of the north-west of Indian traditions) and took the name Kamboja with them and lent it to the regions and rivers on north-west of Iran (Armenia and Albania), just as the Indian while moving southwards have done it with names Ganga and Kosala etc.
It is also said that Cambyses (Jora, Yori or Gori) was the sacred river Champsis (=Cambyses=Kambujiya) of the Scythians before they went to the north Caucasus isthmus via Caspian and Nlanytsch.
Mahabharata abundantly attests that the Kambojas and their kindred Scythian tribes like the Sakas, Tusharas, Khasas etc had played a very prominent role in the Kurukshetra war where they had all fought under the supreme command of Sudakshina Kamboja. and had sided with the Kurus.
Chandra Chakravarty says that “the Kambojas… Kamuias in Lion Capital of Mathura, the Kambohs of north-west Punjab was a branch of the Scythian Cambysene of Ancient Armenia”.He writes that the (Caucasian name) Cambysene/Cambyses transliterates into Kamboja and the (Caucasian name) Cyrus into Kuru of the Sanskrit texts. He also notes that the hordes, who had participated in the earlier invasion of Iran along with Yauteyas were the Kambysene Scythians living around the Kambysene region, near Caucasus Mountains in ancient Armenia. Later, they became the Kuru-Kambojas of the Sanskrit texts. These Kuru-Kamboja hordes later got mixed with the mountain based “Parsa-Xsayatia” (Purush-Khattis) Iranians and gave birth to the famous Achaemenian dynastic line of Persia. This might explain as to why the Achamenians chose to name their famous kings as Kambujiya (Cambyses) and Kurush (Cyrus).
James Hope Moulton however, remarks: “The names Kuru and Kamboja are of disputed etymology, but there is no reason whatever to doubt their being Aryan. I do not think there has been any suggestion more attractive than that made long ago by Spiegel that they attach themselves to Sanskrit Kura (Kuru) and Kamboja, originally Aryan heroes of the fable, whose names were naturally revived in a royal house (in Persia)….Kamboja is a geographical name, and so is Kuru often: hence their appearance in Iranian similarly to-day as Kur and Kamoj”.
Chandra Chakravarty further states that the Kambohs of NW Punjab are the modern representatives of these Scythian Kambysene, whom he calls Scythian Kambojas. He further asserts that a branch of these Scythian Kambysenes which had settled in the north-west India (in northern Afghanistan) became known in ancient Sanskrit/Pali texts as Kamboja; and yet another branch of them reached Tibetan plateau where they got mixed with the locals; and some Tibetans are still called Kambojas.