Linked from
The 5 pages that link to Vietnamese monarchy, each with the reason it gives.
Nguyễn dynastyNarrower topic: The Nguyễn were the final dynasty within this longer institution.
Trần dynastyNarrower topic: The Trần dynasty was one ruling house within this longer institution.
Bảo ĐạiNarrower topic: Bảo Đại’s imperial office was the final form of this institution.
Đại ViệtNarrower topic: Emperors and royal courts supplied Đại Việt’s central political authority.