Aviv Geffen is not a jazz musician. Born May 10, 1973 in Ramat Gan, the son of author Yehonatan Geffen and actress Nurit Geffen, he became one of Israel's defining rock stars in the 1990s, with a fanbase popular enough to earn its own nickname, the Moonlight Children. His career runs through solo rock records, his band Blackfield (co-founded with Porcupine Tree's Steven Wilson), and his band HaTauyot, alongside rock and alternative collaborations with Berry Sakharof, The Idan Raichel Project, and Eviatar Banai.

He's included in this system for one specific, dated studio credit. His self-titled 2009 English-language album, produced with Trevor Horn, David Andrew Sitek, and Ken Nelson, features pianist Mike Garson on track 7. Garson has a serious jazz career of his own, built on avant-garde jazz playing well before his multi-decade run as David Bowie's pianist, which is what he's most publicly known for.

Geffen's music sits entirely within rock and alternative songwriting, dealing with love, peace, death, politics, and the Israeli army, none of it jazz. The Mike Garson credit is the single point of overlap between his career and this project: a working jazz pianist contributing to one track of one album, not a stylistic crossover on Geffen's part.