Aviv Geffen (אביב גפן, born May 10, 1973) is an Israeli rock musician, singer, songwriter, producer, keyboardist and guitarist. He is the son of writer and poet Yehonatan Geffen and Nurit Makover (sister of Eli Makover), brother of Shira Geffen, and a graduate of Rimon School of Jazz and Contemporary Music. Geffen was extremely popular among Israeli youth, who were later known as the "Moonlight Children", in the 1990s. Politically, he associates with the Israeli left.