The folk etymology holds that Charlemagne had named the region as a reference to the Biblical Canaanite valley of Endor or Andor (where the Midianites had been defeated), a name bestowed by his heir and son Louis the Pious after defeating the Moors in the "wild valleys of Hell".
ðə fˈoʊk ˌɛɾɪmˈɑːlədʒi hˈoʊldz ðæt tʃˈɑːɹlɪmˌæɡni hæd nˈeɪmd ðə ɹˈiːdʒən æz ɐ ɹˈɛfɹəns tə ðə bˈɪblɪkəl kˈænɑːnˌaɪt vˈæli ʌv ɛndˈoːɹ ɔːɹ ˈændoːɹ wˌɛɹ ðə mˌɪdɪˈænaɪts hɐdbɪn dᵻfˈiːɾᵻd, ɐ nˈeɪm bᵻstˈoʊd baɪ hɪz ˈɛɹ ænd sˈʌn lˈuːi ðə pˈaɪəs ˈæftɚ dᵻfˈiːɾɪŋ ðə mˈʊɹz ɪnðə "wˈaɪld vˈælɪz ʌv hˈɛl".