After completing your query, the Relationships page will provide you with information on how the individuals returned from your search criteria are related to each other. It will provide the numbers of sets of first degree relatives (parent-child, siblings), second degree relatives (half sibs, grandparent-grandchild, and aunt/uncle-niece/nephew), and third degree relatives (first cousins only).

This information focuses on sets of relatives.

  1. First degree relatives are parent-child and siblings
  2. Second degree relatives include half sibs, grandparent-grandchild, and aunt/uncle-niece/nephew.
  3. Third degree relatives include first cousins only and not other 3rd degree relatives.

The information returned uses all UPDB sources: genealogy, birth certificates and death certificates.

Contact Us

Research Informatics Director
Andrew Post, MD, PhD

Research Informatics Associate Director
Shirleen Hewitt, DBA


HCI Senior Director Oversight
Aik Choon Tan, PhD

Faculty Advisory Committee Chair
Aik Choon Tan, PhD

Faculty Advisory Committee Members
HCI Research Executive Committee