Kisumu is a Kenyan city located on the shores of Lake Victoria. The name Kisumu is derived from the Luo word "Sumo" which means "a place of barter trade". There are several synonyms that can be used to refer to Kisumu, including "Luo Nyanza", which refers to the wider region Kisumu is located in. Another alternative is "Kisumo", which is the full Luo name for the city. Additionally, "Port Florence" is a name commonly used to refer to Kisumu due to its historical importance as a major trading port. Finally, Kisumu is sometimes referred to as the "Rock City" due to the abundance of volcanic rocks in the area.