The two sons of Raivya, named Arvavasu and Paravasu, were employed by the intelligent Brihadyumna to assist him in the sacrifice.
तेन रैभ्यस्य वै पुत्रावर्वावसुपरावसू। वृतौ संहायौ सत्रार्थं बृहद्द्युम्नेनधीमता॥