The Order of the Iron Gauntlet is the oldest in the Kingdom. They are the order of the King’s Guardian Knights. Though they are Generals and Warriors of note, they act as the King’s bodyguards in battle and interesting situations.
This is a knightly order of the kingdom, which does not require its members to of noble line, just noble attitude. Each member must be knighted for duty to kingdom or be of knightly rank (or greater) by birth. The order was formed by the Queen of the Rose, Queen Isa, hence the name. The order’s primary duty is as The Queen’s Guard.
In the Middle Ages, and even up to the early twentieth century, most of Europe's executioners were related: the Sansons and Deiblers in France, the Pierrepoints in England, etc. The reason for this was that, it generally not being socially acceptable to, well, kill people, executioners and their children could, generally, only marry other executioners or their children.
The parallels with massively inbred, Hapsburg-style dynasties are obvious- imagine a rather clever but politically inept satirist noting this, and being sentenced by the latter to a meeting with the former; even worse, imagine a dynasty of deranged and deformed executioners- think Texas Chaisaw Massacre with government funding.