Yes I mean Queen Azshara.
Or was she the first night elf to be born?
We know that the well of eternity is what caused a certain group of Trolls to become night elves. No one is Queen Azshara's family brought into the light or question. She may for all we currently know she has no family for a reason... and its because she wanted nobody to know that her mother was a troll and so was she. There is no lore that shows a former king or a former queen before her. Night elves even before the gift of immortality could live very long lives.
Tyrande is 13,836 years old as of the 3rd war. So she was almost 4000 years old at the time of the sundering. Queen Azshara is of an undetermined age, but could be much older than she appears since she magically altered her appearance. Both Malfurion and Tyrande along with Illidan have lore based childhoods, with Azshara still the queen during that time period. Maybe she was always the queen?
In Vashj'r you get to see a statue of Vashj's mother who apparently also served under Queen Azshara. Giving you even more of a glimpse of how old Azshara really was.
I suspect Queen Azshara was one of the first trolls to be blessed by the well of eternity and one of the first to become a night elf. Maybe this is what gave her such legitimacy and such power over her subjects. Being the first of the blessed to bless others.