Those deities named Pitris were created by the SelfCreate. Others also, highly blessed, viz., the Ushmapas, were created by him. For all these, shares have been sanctioned of the offerings made at Shraddhas.
देवास्तु पितरो नाम निर्मिता ये स्वयम्भुवा। उष्णपा ये महाभागास्तेषां भाग: प्रकल्पितः॥