[Luthien_ Tinuviel]

Ah, the good old hobbit family trees. Maybe it is harder than I thought.... I used an internet resource, and didn't realize that the needed info is probably on two separate trees. So, I'll give a hint, which is the fact that the paternal great-grandfather is Hildigrim Took, and the sister I'm looking for is Mirabella Took. You may need to use both the Took and Brandybuck trees. No one has it yet.