Pancha Buddha is known as the set of five Buddha. Five Buddha are commonly known as Dhyani Buddhas. Five Buddhas are not separate gods. They are the just abstract aspect of Buddhahood called Tathagata. It is also said that all 5 Dhyani Buddhas are said to have originated from Vajrasattva himself.
Five Dhyani Buddhas, popularly known as Pancha Buddha are five representatives of five different qualities of Shakyamuni Buddha.
Pancha Buddhas are also known as Five Wisdom Tathagatas and are widely respected in Vajrayana Buddhism. In Sanskrit, they are known as the Five Conqueror, or Victor and are common subjects in Vajrayana Buddhist tradition. These Pancha Buddhas are Vairochana, Akshobhaya, Amitabha, Ratnasambhava, Amoghasiddhi.