What is "subhakarasimha"

Śubhakarasiṃha (637-735 CE) was an eminent Indian Buddhist monk and master of Esoteric Buddhism, who arrived in the Chinese capital Chang'an (now Xi'an) in 716 CE and translated the , better known as the Mahāvairocana Sūtra. Four years later another master, Vajrabodhi (670-741 CE), and his pupil Amoghavajra (705-775 CE), would arrive and proceeded to translate other scriptures, thus establishing a second esoteric tradition. Along with these other masters, Śubhakarasiṃha was responsible for bringing Esoteric Buddhism to the height of its popularity in China.