The word Yona in Pali and the Prakrits, and the analogue Yavana in Sanskrit, were 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 India.

Both terms appear in ancient Sanskrit literature. Yavana appears, for instance, in the Mahabharata, while Yona appears in texts such as the Sri Lankan chronicle Mahavamsa.

The Yona are mentioned in the Ashoka inscriptions, along with the Kambojas, as two societies where there are only nobles and slaves.

Examples of direct association of these terms with the Greeks include:

In general, the words "Yoṇa" or "Yoṇaka" were the current Greek Hellenistic forms, while the term "Yavana" was the Indian word to designate the Greeks or the Indo-Greeks.

This usage was shared by many of the countries east of Greece, from the Mediterranean to Sindh:

The usage of "Yona" and "Yavana, or variants such as "Yauna" and "Javana", appears repeatedly, and particularly in relation to the Greek kingdoms which neighboured 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 Yavanar 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 neighbours to the Kambojas.^{[citation needed]} The references to the Yonas in the early Buddhist texts, and Menander I (Pali: Milinda), may be related to the same.