Which number gave its Latin name to the month October?

In the ancient Roman calendar, October was the name of the eighth month of the year. Its name comes from "octo", the Latin word for “eight.” When the Romans converted to a 12-month calendar, they tried to rename this month after various Roman emperors, but the name October stuck!

In Old England, the month was called "Winmonath", which means “wine month,” for this was the time of year when wine was made. The English also called it "Winterfylleth", or “Winter Full Moon.” They considered this full Moon to be the start of winter. In weather lore, we note, “If October brings heavy frosts and winds, then will January and February be mild.”