2. John Deacon's nickname. It's actually spelt Deakey.
The song "Procession" from Queen's debut album, Queen, used the Deakey amp too.
(About the guitar sound in the song, "Procession")
Brian May: You know what that is? That's this Deakey amp. It's a little one-watt amp that John Deacon built and brought into the studio one day. I had done "Procession" with AC30s, and it sounded just a little bit too smooth. I wanted it to sound more violin-like and orchestral, so I double tracked some of the layers using that amp. Incredible. (Excerpt of an interview from the magazine, Guitar Legends.)