Trivia

Lead guitarist of Speed Metal band Slayer. Composed the music for the majority of their hit songs (e.g.: Seasons in the Abyss, Dead Skin Mask, Angel of Death, Postmortem, South of Heaven, Black Magic, The Antichrist).

He once collected German medals. His father (who fought in Normandy in 1944) asked him if he wanted a medal. Jeff accepted and eventually he asked if he could have another one. He then began to buy medals from different dealers, and he soon learned to discover the fake medals from the real ones. He stopped collecting, because he said that it was too expensive.

Wrote probably the most well-known thrash song ever, 'Angel Of Death'.

He was a good friend of 'Gary Holt (III)' from the thrash metal band Exodus. Following Hanneman's was diagnosis with necrotizing fasciitis via a spider bite in January 2011, Holt was brought in as a temporary replacement for him on Slayer's future tours. However, he ended up as a full-time member of the band after it became clear that Hanneman was not returning to Slayer because of his condition and eventually died in 2013.

He is very interested in ice hockey and often wears a hockey shirt. He lives out in nowhere, to be away from the hectic life, they normally have.