Based on the provided source material, Sandun is identified as a given name rather than a city. The information does not provide any geographical location or municipal details for a place by this name.
Notable individuals with the name Sandun include several Sri Lankan cricketers, such as Sandun Dias, Sandun Fernando, Sandun Mendis, Sandun Rathnatunga, and Sandun Weerakkody. Additionally, Sandun Wijemanne Nissanka is identified as a Sri Lankan-American record industry executive.