At the Laboratory of Plant Breeding of Wageningen University, a large amount of pedigree data on current and historic potato cultivars and progenitors has been collected over many years. The sources and reasons for collection of these data are discussed. To allow others to use this data set for their own purposes, we have created a Web-accessible interface that allows querying of these data, e.g., for the ancestry of a cultivar of interest. This Web interface was recently extended and improved to allow users to create reports and dynamically created pedigree-tree images. Availability of this resource and the options provided by the new Web interface are presented.