Wikipedia
Gadjo is the alias of the German DJ, producer and remixer, Murat Arslan. He is known for his hit " So Many Times", featuring Alexandra Prince on vocals. It became an international club hit in the winter of 2005, peaking in 2006 (although it peaked at no. 22 in May 2005, in the UK Singles Chart)
Erick Morillo signed him to Subliminal Records in 2005. His first major hit single "So Many Times" reached #1 in fourteen countries' dance charts. This included a spell at #1 in the US Billboard Hot Dance Club Songs chart, and it peaked at #22 in the UK Singles Chart.
In Romani culture, a gadjo (feminine: gadji) is a person who has no Romanipen. This usually corresponds to not being an ethnic Romani, but it can also be an ethnic Romani who does not live within Romani culture. It is often used by Romanies to address or denote outsider neighbors living within or very near their community. Romanies of Western Europe and the Americas often interpret gadjos as "impure" because they consider that only those following Romani Code are "pure".