Was it even revealed where the El Aurian homeworld was?
It was set in concrete in "Generations", that the transports trapped in the subspace ribbon were "El Aurian refugees".
To the best of my knowledge, Guinan's race was never mentioned in TNG. Wesely certainly didn't even know where she was from in "Ensigns of Command" (or was it "Evolution", one or the other). Even in "Q-Who" she only says "my planet" or "my people" where decimated by the Borg; never a proper name.
However, in DS9's "Rivals", Martus Mazur was explictly said to be an El Aurian, and the writers said he was the same race as Guinan and was originally written to have been her son.