Not necessary (rgd the edit). Comparative linguistics (however questionable) is a thing. For example, the page for October - https://en.wiktionary.org/wiki/Octo

Not necessary (rgd the edit). Comparative linguistics (however questionable) is a thing. For example, the page for October - https://en.wiktionary.org/wiki/October https://en.wiktionary.org/wiki/October - does not mention any connection to indo-germanic languages where "october, november and december" have roots that map to the sanskrit "ashta, nava, dasha" (eight, nine, ten) which correspond to the eighth, ninth and tenth months in the roman calendar.