Blastkrizzle, you mean this source for her
“We must put this misery behind us. We must enter a new chapter! And so I say to you that, as of this day, we are no longer high elves! In honor of the blood that was shed throughout this kingdom, in honor of the sacrifices of our brothers and sisters, our parents, and our children, in honor of Anasterian… as of this day we will take the name of our royal lineage! As of this day, we are sin’dorei! For Quel’Thalas!”
That is from Blood of the Highborne.