Welcome to the Cisneros Surname Project, where heritage meets science. We explore the origins and unfolding of the Cisneros surname, rooted in the medieval town of Cisneros in Palencia, Spain, and now found across Latin America, the United States, and beyond. The name has appeared in historical records for centuries, including during the Renaissance period when figures such as Cardinal Francisco Jiménez de Cisneros brought it wider recognition through his political and cultural roles in Spain. While not the origin of the surname, his prominence helped make the name familiar in historical writings and records. We connect men bearing the Cisneros name and its variations such as de Cisneros, Cisnero, Sisneros, Zisneros through Y-DNA testing and genealogical records to uncover shared lineages and ancestral ties. By combining genetic evidence with family stories, we reveal how various branches of the Cisneros family have evolved and intersected over time. Participants gain insight into their paternal DNA connections with other Cisneros lines around the world. They also receive access to family tree research, historical migration data, and archival documents, strengthening their connection to a heritage shaped by centuries of tradition. By joining, you help expand a growing body of collective discovery and preserve the history of the Cisneros name for generations to come. Men with the Cisneros surname or recognized variations are invited to participate and contribute to this global family narrative. 

For members researching lineages downstream of the Cisneros Y-DNA haplogroup J-Z631, please contact the project administrator, Ruby Casteel, for any questions. For members belonging to other Cisneros Y-DNA haplogroups, please reach out to co-administrator Mario Cisneros.