Alexander Kotz, known professionally as Elderbrook, is a British musician, songwriter and producer. His career as a musician began in 2015, when he released his first EP, which contained the song, "How Many Times" which went on to be remixed by German duo Andhim, becoming one of Mixmag's best songs of 2015. During 2016, he collaborated with a number of artists, including Gorgon City. He also remixed tracks by a number of well-known artists, such as Clean Bandit.