YONA SABAR:
Hebrew Word of the Week: rimmon “pomegranate.”The pomegranate is one of several components of the Sephardic seder for Rosh Hashanah, the Jewish New Year holiday. The symbolic reason for eating it is “so that we become filled with mitzvot (good deeds, religious observations), as the pomegranate is filled with seeds.” Interestingly, the English word also means “apple/fruit full of grains (seeds),” from French-Latin pomum granatum. Compare to Pomona, the Roman goddess of fruits.
And there's more on the possible etymologies of the word.