The word Yona in Pali and the Prakrits, and the analogue "Yavana" in Sanskrit, are words used in Ancient India to designate Greek speakers. "Yona" and "Yavana" are transliterations of the Greek word for "Ionians" (Ancient Greek: Ἴωνες < Ἰάoνες < *Ἰάϝoνες), who were probably the first Greeks to be known in the East.
Examples of direct association of these terms with the Greeks include:
The usage of "Yona" and "Yavana, or variants such as "Yauna", "Yonaka" and "Javana", appears repeatedly, and particularly in relation to the Greek kingdoms which neighbored or sometimes occupied the Punjab over a period of several centuries from the 4th century BCE to the first century CE, such as the Seleucid Empire, the Greco-Bactrian Kingdom and the Indo-Greek Kingdom. The Yavanas are mentioned in detail in Sangam literature epics such as Paṭṭiṉappālai, describing their brisk trade with the Early Cholas in the Sangam period.
After Alexander the Great's invasion, the Greek settlements had existed in eastern parts of Achaemenid Empire, northwest of India, as neighbors to the Kambojas. The references to the Yonas in the early Buddhist texts may be related to the same.
Some of the better-known examples are those of the Edicts of Ashoka (c. 250 BCE), in which the Buddhist emperor Ashoka refers to the Greek populations under his rule. Rock Edicts V and XIII mention the Yonas (or the Greeks) along with the Kambojas and Gandharas as a subject people forming a frontier region of his empire and attest that he sent envoys to the Greek rulers in the West as far as the Mediterranean, faultlessly naming them one by one.
In the Gandhari original of Rock XIII, the Greek kings to the West are associated unambiguously with the term "Yona": Antiochus is referred as "Amtiyoko nama Yonaraja" (lit. "The Greek king by the name of Antiochus"), beyond whom live the four other kings: (lit. "And beyond Antiochus, four kings by the name of Ptolemy, the name of Antigonos, the name of Magas, the name Alexander")."param ca tena Atiyokena cature 4 rajani Turamaye nama Amtikini nama Maka nama Alikasudaro nama"
Other Buddhist texts such as the Dipavamsa and the 1861 Sasana Vamsa reveal that after the Third Buddhist council, the elder monk (thero) Maharakkhita was sent to the "Yona country" and he preached Buddhism among the Yonas and the Kambojas, and that at the same time the Yona elder monk (thero) Dharmaraksita was sent to the country of Aparantaka in Western India also. Ashoka's Rock Edict XIII also pairs the Yonas with the Kambojas (Yonakambojesu) and conveys that brahmans and śramaṇas are found everywhere in his empire except in the lands of the Yonas and the Kambojas.
The Mahavamsa or "Great Chronicle" of Sri Lanka refers to the thera Mahārakkhita being sent to preach to the Yona country, and also to the Yona thera Dhammarakkhita, who was sent to Aparanta ("the Western Ends"). It also mentions that Pandukabhaya of Anuradhapura set aside a part of his capital city of Anuradhapura for the Yonas.
Another example is that of the Milinda Panha (Chapter I), where "Yonaka" is used to refer to the great Indo-Greek king Menander (160–135 BC), and to the guard of "five hundred Greeks" that constantly accompanies him.
The Vanaparava of Mahabharata contains prophecies that "Mleccha kings of the Shakas, Yavanas, Kambojas, Bahlikas etc. shall rule the earth un-righteously in Kaliyuga ...". This reference apparently alludes to chaotic political scenario following the collapse of the Maurya and Shunga Empires in northern India and its subsequent occupation by foreign hordes such as of the Yonas, Kambojas, Sakas and Pahlavas.
Indologists like Dr H. C. Raychadhury, Dr B. C. Law, Dr Satya Shrava and others see in these verses the clear glimpses of the struggles of the Hindus with the mixed invading hordes of the barbaric Sakas, Yavanas, Kambojas, Pahlavas etc. from north-west. The time frame for these struggles is 2nd century BCE downwards.
The other Indian records prophecies the 180 BCE Yona attacks on Saket, Panchala, Mathura and Pataliputra, probably against the Shunga Empire, and possibly in defense of Buddhism: "After having conquered Saketa, the country of the Panchala and the Mathuras, the Yavanas, wicked and valiant, will reach Kusumadhvaja ("The town of the flower-standard", Pataliputra). The thick mud-fortifications at Pataliputra being reached, all the provinces will be in disorder, without doubt. Ultimately, a great battle will follow, with tree-like engines (siege engines)." "The Yavanas will command, the Kings will disappear. (But ultimately) the Yavanas, intoxicated with fighting, will not stay in Madhadesa (the Middle Country); there will be undoubtedly a civil war among them, arising in their own country, there will be a terrible and ferocious war." The "Anushasanaparava" of the Mahabharata affirms that the country of Majjhimadesa was invaded the Yavanas and the Kambojas who were later utterly defeated. The Yona invasion of Majjhimadesa ("middle country, midlands") was jointly carried out by the Yonas and the Kambojas. Majjhimadesa here means the middle of Greater India which then included Afghanistan, Pakistan and large parts of Central Asia.
Buddhist texts like Sumangala Vilasini class the language of the Yavanas with the Milakkhabhasa i.e. impure language.
Some of the friezes of Sanchi also show devotees in Greek attire. The men are depicted with short curly hair, often held together with a headband of the type commonly seen on ancient Greek coinage. The clothing too is Greek, complete with tunics, capes and sandals. The musical instruments are also quite characteristic, such as the double flute called aulos. Also visible are carnyx-like horns. They are all celebrating at the entrance of the stupa. These men would be foreigners from north-west India visiting the stupa, possibly Mallas, Indo-Scythians or Indo-Greeks.
In the Great Chaitya of the Karla Caves built and dedicated by Western Satraps Nahapana in 120 CE, there are six inscriptions made by self-described Yavana donors, who donated six of the pillars, although their names are Buddhist names. They account for nearly half of the known dedicatory inscriptions on the pillars of the Chaitya.
The Mahabharata groups the Yavanas with the Kambojas and the Chinas and calls them "Mlechchas" (Barbarians). In the Shanti Parva section, the Yavanas are grouped with the Kambojas, Kiratas, Sakas, and the Pahlavas etc. and are spoken of as living the life of Dasyus (slaves). In another chapter of the same Parva, the Yaunas, Kambojas, Gandharas etc. are spoken of as equal to the "Svapakas" and the "Grddhras".
Udyogaparva of Mahabharata says that the composite army of the Kambojas, Yavanas and Sakas had participated in the Mahabharata war under the supreme command of Kamboja king Sudakshina. The epic numerously applauds this composite army as being very fierce and wrathful.
Balakanda of Ramayana also groups the Yavanas with the Kambojas, Sakas, Pahlavas etc. and refers to them as the military allies of sage Vishistha against Vedic king Vishwamitra The Kishkindha Kanda of Ramayana locates the Sakas, Kambojas, Yavanas and Paradas in the extreme north-west beyond the Himavat (i.e. Hindukush).
The Buddhist drama Mudrarakshasa by Visakhadutta as well as the Jaina works Parishishtaparvan refer to Chandragupta's alliance with Himalayan king Parvataka. This Himalayan alliance gave Chandragupta a powerful composite army made up of the frontier martial tribes of the Shakas, Kambojas, Yavanas, Parasikas, Bahlikas etc. which he may have utilised to aid defeat the Greek successors of Alexander the Great and the Nanda rulers of Magadha, and thus establishing his Mauryan Empire in northern India.
Manusmriti lists the Yavanas with the Kambojas, Sakas, Pahlavas, Paradas etc. and regards them as degraded Kshatriyas (Hindu caste). Anushasanaparva of Mahabharata also views the Yavanas, Kambojas, Shakas etc. in the same light. Patanjali's Mahabhashya regards the Yavanas and Sakas as Anirvasita (pure) Shudras. Gautama-Dharmasutra regards the Yavanas or Greeks as having sprung from Shudra females and Kshatriya males.
The Assalayana Sutta of Majjhima Nikaya attests that in Yona and Kamboja nations, there were only two classes of people...Aryas and Dasas...the masters and slaves, and that the Arya could become Dasa and vice versa. The Vishnu Purana also indicates that the "Chaturvarna" or four class social system was absent in the lands of Kiratas in the East, and the Yavanas and Kambojas etc. in the West.
Numerous Puranic literature groups the Yavanas with the Sakas, Kambojas, Pahlavas and Paradas and refers to the peculiar hair styles of these people which were different from those of the Hindus. Ganapatha on Pāṇini attests that it was a practice among the Yavanas and the Kambojas to wear short-cropped hair (Kamboja-mundah Yavana-mundah).
Brihatkathamanjari of Kshmendra informs us that king Vikramaditya had unburdened the sacred earth of the Barbarians like the Shakas, Kambojas, Yavanas, Tusharas, Parasikas, Hunas etc. by annihilating these sinners completely.
The terms "Yona", "Yonaka" or "Yavana" literally referred to the Greeks, however "mlechas" was also used probably due to their barbaric behaviour as invaders. Indian languages did not base a distinction on religion early on but after the arrival of Islam to the subcontinent, the term Yavana was used along with Turuka, Turuska, Tajik, and Arab more than Mussalaman or Muslim for invaders professing Islam as their religion.
The word Yona, or one of its derivatives, is still used by some languages to designate contemporary Greece, such as in Arabic (يونان), in Hebrew (יוון), in Turkish ("Yunanistan"), in modern Aramaic (Yawnoye ܝܘ̈ܢܝܐ), or the Pashto, Hindi, Urdu, Malay and Indonesian languages ("Yunani").