[X] It can't hurt to try. The Weilu are ancient after all, surely most everyone had a drop or two of their blood in them. Imagine how useful it would be, to claim some ancient connection.
[X] There was no need for it. The character for Ling meant 'Zero' and that is what she had started as. If there were any lineage she would claim, it was her teachers, claimed through her own effort.