Influence of Etruscan sacred books This imposing system of "revealing" and "sacred texts" left a significant imprint on the neighboring italic peoples. There is ample evidence of the Etruscan culture having heavily permeated the less-advanced communities of their Latin and Sabine neighbours. For example, the Etruscan alphabet that was derived from the Greek one, is solidly established as having inspired the Latin alphabet. The principles and architectural rules of the Etruscan decimal numeral system, likewise, are recognized as the origin of the Roman one that is a simplified version of the Etruscan (see: Etruscan numerals) . Similarly derived are the symbols of supreme power (see Etruscan civilization) ; the structure of the calendar in Rome (“itis” or “itus”, the Etruscan notion for the middle of the lunar month, has given the Roman Ides; the Etruscan word for calendar, Kalendae, has given calendae, the first day of the month); and the Etruscan Craeci is the source for the word “Greeks” when those people identified themselves as Hellenes; etc."Langue étrusque" (in French Wikipedia) ).
Influence of Etruscan sacred books This imposing system of "revealing" and "sacred texts" left a significant imprint on the neighboring italic peoples. There is ample evidence of the Etruscan culture having heavily permeated the less-advanced communities of their Latin and Sabine neighbours. For example, the Etruscan alphabet that was derived from the Greek one, is solidly established as having inspired the Latin alphabet. The principles and structural rules of the Etruscan decimal numeral system, likewise, are recognized as the origin of the Roman numerals that are a simplified version of the Etruscan system . Similarly derived are the symbols of supreme power (see Etruscan civilization) , the structure of the Roman calendar, and the Etruscan Craeci is the source for the word “Greeks” (who self-identified as Hellenes), etc."Langue étrusque" (in French Wikipedia) 
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calendar in Rome (“itis” or “itus”, the Etruscan notion for the middle of the lunar month, has given the Roman Ides; the Etruscan word for calendar, Kalendae, has given calendae, the first day of the month);
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when those people identified themselves as Hellenes;
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