ṯmny / Semitic roots

1. Shemini Atzereth, from Hebrew šəmînî, eighth, from šəmōne, eight.

2. Heshvan, from Hebrew ḥešwān, a month name, short for marḥešwān, from Akkadian (w)araḫsamnu, the eighth month of the Babylonian calendar, from samnu, eighth, from samāne, eight.