Some would maintain that the premier animal of the Indo-European sacrifice and ritual was probably the horse. We have already seen how its embedment in Proto-Indo-European society lies not just in its lexical reconstruction but also in the proliferation of personal names which contain horse as an element among the various Indo-European peoples. Furthermore, we witness the importance of the horse in Indo-European rituals and mythology. One of the most obvious examples is the recurrent depiction of twins such as the Indic Asvins horsemen, the Greek horsemen Castor and Pollux, the legendary Anglo-Saxon settlers Horsa and Hengist [...] or the Irish twins of Macha, born after she had completed a horse race. All of these attest the existence of Indo-European divine twins associated with or represented by horses.