Xavier Petulengro (25 December 1859 - 16 June 1957), more often known as Gipsy Petulengro, was a British Romanichal horse trader, violinist, businessman, writer and broadcaster, known as the "King of the Gypsies". He frequently broadcast on BBC radio in the 1930s and 1940s, and later wrote regular astrology columns in magazines as well as publishing his autobiography and several books on Romani lore.