I had a look in Mallory and Adams, Encyclopedia of Indo-European Culture under the lemma "Cow," which is extensive at several pages long, but nothing about the myth or a name is mentioned there. They do mention the name of a godlike cow that produces a lot of milk in several cultures, but that's not the same thing. Doing keyword searches in the book also turns up nothing. They do mention it briefly in their Introduction to Indo-European at 25.3 "Creation" heading, but again they just note that there is an archetypal creation myth shared by Celtic, Germanic, Iranian, Indo-Aryan, and Slavic in which a figure is dismembered to create the world, either a cow (Nordic Ymir) or a man (Vedic puruṣa पुरुष). If you know another place you want to look that you can't access, let me know.