Ida Greene is the mother of Dr. Leonard Greene and the paternal grandmother of Amy, Rachel and Jill Greene. This relationship makes her the great-grandmother of Rachel's daughter, Emma.

She is an unseen character on the show; she is mentioned in "The One With Rachel's Phone Number" when Phoebe and Rachel go out to a bar and meet two guys who live in her building.

Apparently, she smells like potatoes so the people who lived in her building nicknamed her "Spuds."

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