hayasirsa
hayaśīrṣa-abhidhānām — the Lord's incarnation named Hayaśīrṣa (also called Hayagrīva);
SB 5.18.1
hayaśīrṣa-pañcarātre — the revealed scripture named the Hayaśīrṣa-pañcarātra;
CC Madhya 20.237