The phrase describes a familial relationship. Specifically, it identifies the individual who is the granddaughter of one’s great-grandmother’s brother. This individual shares a lineage that extends from the same set of great-grandparents, albeit through different branches of the family tree. An example would be a person tracing their lineage back to their great-grandmother’s brother, and the person in question is that brother’s granddaughter.
Understanding such relationships can be beneficial in genealogical research, estate planning, and family history projects. Clarifying these links aids in constructing accurate family trees, identifying potential heirs, and preserving cultural heritage. Historically, such relationships were important in determining social standing, inheritance rights, and marriage eligibility within specific communities.