Daily AncestorGreat-granduncle
A great-granduncle is the brother of one of your great-grandparents: an uncle of one of your grandparents.
A great-granduncle sits one generation above a great-uncle. He was your grandparent's uncle, a brother (or brother-in-law) of one of your great-grandparents.
Because grand and great are mixed in these names, mistakes are easy. Count it out: uncle is a parent's brother, great-uncle a grandparent's brother, great-granduncle a great-grandparent's brother. His grandchildren are your parent's second cousins.
As seen in a recordCounty history sketch, 1880s
Col. Ithiel Brackwater, the great-granduncle of the present owner
How to cite this page
Daily Ancestor. "Great-granduncle." Dictionary of Old Record Words. https://dailyancestor.com/dictionary/relationships/great-granduncle. Last checked 2026-10-12.