Pjotr is a Russian form of Peter. It is derived from the Greek name Petros. The meaning of Pjotr is 'rock' or 'stone.' This name is usually given to a baby boy in Portugal, Belgium, the Netherlands, Liechtenstein, Australia, Canada, the USA, New Zealand, and England. Pjotr is also used as a surname. It is used in Germany, Canada, the USA, Austria, France, Ireland, Brazil, England, and the Netherlands as a surname. Some notable personalities with this name are Russian composer Pjotr tšaikovski, rap artist Pjotr..