Historigen, LLC is a mother-daughter genealogy company founded in 2024 by Nancy Dierker and Libby Dollar. With a shared passion for uncovering family stories and a commitment to precision and care, Nancy and Libby bring together decades of experience in genealogy research, investigative genetic genealogy, legal documentation, and data management.
At Historigen, we specialize in traditional genealogy research, adoptee parent identification using DNA, verifying family myths, locating ancestors’ final resting places, and supporting lineage society applications such as those for the Daughters of the American Revolution (DAR).
Whether you’re searching for long-lost family connections, validating family legends, or building a solid foundation for your lineage application, Historigen is here to guide and support you every step of the way.
Nancy Dierker

Nancy is the founder of Historigen, LLC, where she blends her love of history and genealogy with decades of experience in project management, legal research, and technology. A certified legal assistant and former IT project manager, Nancy has successfully overseen multi-million dollar contracts, bringing precision, dedication, and exceptional organizational skills to every project she undertakes.
As a passionate genealogist and history enthusiast, Nancy is skilled at tracing elusive ancestors and uncovering the rich narratives found in historical records. She works closely with clients to either conduct in-depth research on their behalf or provide them with personalized guides they can follow to explore their histories independently. Nancy also serves as the editor of the Colorado Genealogical Society newsletter.
At Historigen, Nancy is dedicated to helping clients connect with their heritage and bring their ancestors’ stories to life. Her approach is defined by meticulous research, innovative problem-solving, and a genuine enthusiasm for preserving history for future generations.
Libby Dollar

Libby is a certified Investigative Genetic Genealogist and the co-founder of Historigen, LLC. With a degree in Management Information Systems and Data Analytics, she combines her technical expertise with a passion for uncovering identities and solving complex family mysteries. Through her volunteer work on adoptee parentage cases and collaborations with law enforcement agencies, Libby has established herself as a dedicated genetic genealogist. Libby is also a volunteer for the Colorado Genealogical Society.
Libby is known for her ability to navigate and simplify complex technologies, making them accessible and approachable for clients and colleagues alike. She approaches each case with precision, compassion, and a deep commitment to uncovering the truth. Whether working on sensitive cases or empowering others to explore their family histories, Libby is driven by the transformative power of DNA and the stories it can reveal.
At Historigen, Libby is passionate about helping clients connect with their roots and uncover the stories that define their unique heritage. Her work reflects a dedication to excellence, a meticulous attention to detail, and a heartfelt belief in the importance of preserving family history.