What is "yerrapragada"

Errana or Errapregada was a Telugu poet in the court of Prolaya Vemareddy (1325–1353), the founder of Reddy dynasty (1325–1424) of Kondaveedu, who ruled Guntur, Prakasam, Nellore, and Kurnool districts of the state of Andhra Pradesh. Errana was also known as Yellapregada or Errapregada. He was honored with the title Prabandha Parameshwara (the supreme lord of Prabandha) and Shambudasusu.