What is "radhanite"

The Radhanites (also Radanites, Arabic الرذنية ar-Raðaniyya; Hebrew sing. רדהני Radhani, pl. רדהנים Radhanim) were medieval Jewish merchants. Only a limited number of primary sources use the term, and it remains unclear whether they referred to a specific guild, or to a clan, or generically to Jewish merchants in the trans- Eurasian trade network. Jewish merchants operated in trade between the Christian and Islamic worlds during the early Middle Ages (approximately 500–1000). Many trade routes previously established under the Roman Empire continued to function during that period - largely through their efforts. Their trade network covered much of Europe, North Africa, the Middle East, Central Asia and parts of India and China.