Why is the ninth month called September?
Old English pere, peru "pear," common West Germanic (cf. Middle Dutch, Middle Low German pere, Old High German pira, bira, Dutch peer), from Vulgar Latin *pera, variant of Latin pira, plural (taken for fem. singular) of pirum "pear," a loan word from an unknown source. It likely shares an origin with Greek apion "pear," apios "pear tree."