In the Hebrew Bible, before the Babylonian Exile, the month is called Ethanim (Hebrew: אֵתָנִים‎ – 1 Kings 8:2). In the Babylonian calendar the month is known as Araḫ Tišritum, "Month of Beginning" (of the second half-year).

What ethanim means?

: the 7th month of the ancient Hebrew calendar corresponding to Tishri.

What is the meaning of Tishri?

: the first month of the civil year or the seventh month of the ecclesiastical year in the Jewish calendar — see Months of the Principal Calendars Table.