Gentleman Usher of the Blue Rod

The Gentleman Usher of the Blue Rod is the Gentleman Usher to the Most Distinguished Order of Saint Michael and Saint George, established in 1818. If the office holder is female, she is referred to as the Lady Usher of the Blue Rod.
The office was simply designated as that of "Officer of Arms" to the Order from the first appointment in 1882 until 1911, when it received the present name.