Genealogies have been constructed and used for hundreds of years to help families understand their ancestry and more recently to help scholars understand the relationships between medieval people and families. The Rusian genealogical database offers an update on this traditional discipline. The research underlying this database is new and is built on the primary sources in Old East Slavic, Latin, Greek, and Old Norse, as well as a thorough reading and understanding of the modern secondary literature. That information is then accessed through an XML database that allows the user to search through the variety of information presented here, including parentage, regnal dates, place of rule, and other data points. The end result is the most accurate genealogy of Rus′ yet developed, presented in an accessible and intuitive way for use by scholars, students, and others.