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.
Mahadharmarakkhita (Sanskrit: Mahadharmaraksita, literally "Great protector of the Dharma") was a Greek (in Pali:"Yona", Sanskrit: "Yavana", lit. "Ionian") Buddhist master, who lived during the 2nd century BCE during the reign of the Indo-Greek king Menander.
In the Mahavamsa, a key Pali historical text, he is recorded as having travelled from “Alasandra” (thought to be Alexandria of the Caucasus, around 150 kilometers north of today's Kabul, or possibly Alexandria of the Arachosians), with 30,000 monks for the dedication ceremony of the Maha Thupa ("Great stupa") at Anuradhapura in Sri Lanka, when it was completed shortly after the death of the Sri Lankan king Dutthagamani Abhaya (r. 161 - 137 BCE).
Buddhism, a religion founded by Gautama Buddha, first arrived in modern-day Afghanistan through the conquests of Ashoka (r. 268–232 BCE), the third emperor of the Maurya Empire. Among the earliest notable sites of Buddhist influence in the country is a bilingual mountainside inscription in Greek and Aramaic that dates back to 260 BCE and was found on the rocky outcrop of Chil Zena near Kandahar.
Many prominent Buddhist monks were based in Afghanistan during this period: Menander I (r. 165–130 BCE), a Greco-Bactrian king, was a renowned patron of Buddhism and is immortalized in the Milinda Panha, a Pali-language Buddhist text; Mahadharmaraksita, a 2nd-century BCE Indo-Greek monk, is said to have led 30,000 Buddhist monks from "Alasandra, the city of the Yonas" (a colony of Alexander the Great, located approximately 150 kilometres or 93 miles to the north of modern-day Kabul) to Sri Lanka for the dedication of the Mahathupa in Anuradhapura, according to the Mahavamsa (Chap. XXIX); Lokaksema, a 2nd-century Kushan monk, travelled to the Chinese capital city of Luoyang during the reign of the Han dynasty, and was the first translator of Mahayana Buddhist scriptures into the Chinese language.
Antiochus II Theos (Ancient Greek: Ἀντίοχος ὁ Θεός, Antíochos ho Theós, meaning "Antiochus the God"; 286 – July 246 BC) was a Greek king of the Hellenistic Seleucid Empire who reigned from 261 to 246 BC. He succeeded his father Antiochus I Soter in the winter of 262–61 BC. He was the younger son of Antiochus I and princess Stratonice, the daughter of Demetrius Poliorcetes.
Antiochus II was a forceful personality who in his lifetime largely succeeded to hold the sprawling Seleucid realm intact. However his fateful decision to repudiate his first wife Laodice and marry a Ptolemaic princess Berenice as part of a peace treaty led to a succession struggle after his death that would shake the empire's foundations and cause large territorial losses.