the name was changed in WC3 in memory of the fallen and the blood of the highborne, some "high elves" were blood elves at that time as Death-Hunter Hawkspear.
high elves is not the name of a race, it is more similar to the name of a political group.
Another name used by the high elves and still using the blood elves is Beloredorei. We see this in the novel blood of the Highborne and heritage quest