
Nobles in Ishgard are likely most or all Elezen. The four High Nobles Houses are made up of 3 Wildwood families and 1 Dudkwight. Per lore, the 4 High Noble Houses came to be because they were the friends of Haldrath, the first Azure Dragoon, and the man who defeated Nidhogg.
Other, lesser Noble Houses exist, but all of the few we've seen so far have been Elezen. Why no Hyur? Because Hyur did not integrate into Ishgardian society until roughly 450-500 years ago.
Remember Hyur came to Eorzea in three great migratory waves starting 1000 years ago. These first settlers were the Highlanders, who brought war to the Elezen. They conquered Gyr Abania from the Elezen and tried to conquer Belah'dia to the south. The first wave of Midlanders started showing up between 500-800 years ago. Now, while the Hyur and Elezen waged war across the rest of Eorzea, the Elezen of Gelmorra made peace with the Hyur who also wished to live in the Twelveswood. This act would later make the founding of Gridania possible. But this was the first time Hyur and Elezen had come to peace in Eorzea.
So the peace between Ishgardian Elezen and Hyur would have come later. Its possible these new Hyuran Ishgardians could have become nobility, as the lower houses and military seem to follow a meritorious system. ALord Commander Aymeric of the Temple Knights is lowborn and Lucia, his second, is full blooded Garlean. So about anything seems possible in Ishgard.
Other, lesser Noble Houses exist, but all of the few we've seen so far have been Elezen. Why no Hyur? Because Hyur did not integrate into Ishgardian society until roughly 450-500 years ago.
Remember Hyur came to Eorzea in three great migratory waves starting 1000 years ago. These first settlers were the Highlanders, who brought war to the Elezen. They conquered Gyr Abania from the Elezen and tried to conquer Belah'dia to the south. The first wave of Midlanders started showing up between 500-800 years ago. Now, while the Hyur and Elezen waged war across the rest of Eorzea, the Elezen of Gelmorra made peace with the Hyur who also wished to live in the Twelveswood. This act would later make the founding of Gridania possible. But this was the first time Hyur and Elezen had come to peace in Eorzea.
So the peace between Ishgardian Elezen and Hyur would have come later. Its possible these new Hyuran Ishgardians could have become nobility, as the lower houses and military seem to follow a meritorious system. ALord Commander Aymeric of the Temple Knights is lowborn and Lucia, his second, is full blooded Garlean. So about anything seems possible in Ishgard.