All the great beings who were responsible for creation of living beings are called Prajapati in Hinduism. They are all the sons of Lord Brahma. Lord Brahma is also called as Prajapati like his sons. Though Brahma worked hard to create the living entities as per the order of the Supreme Truth, the outcome was not substantial. He then with all severe austerity, penance, worship, trance and bhakti yoga created Maharishis who came to be known as Prajapatis. Later, he gave parts of his body to those great saintly persons. Kardama muni was one such son.Since he played an important role in creating living entities in the creation, he was celebrated as Prajapati.