Nagdir Dade was the father of Aursah Dade, grandfather of Largo Dade and great grandfather of Marcus Dade, who would later become Dade Leviathan. He fought in the Great Sith War, Mandalorian Wars and the Jedi Civil War. He was killed by a Sith upon the world of Tatooine near the end of the Jedi Civil War.
He had been married before he had joined the Jedi and thus was allowed to keep his wife and children when he joined the Order. His youngest son, Aursah, was born a few months before Nagdir was killed upon Tatooine.