Given the task definition and input, reply with output. Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

In the published version of The Silmarillion, Orodreth (IPA: (orodre)) was an Elf of the First Age, the second son of Finarfin (with Finrod Felagund, Angrod, Aegnor, and Galadriel being his siblings), and a ruler of Nargothrond.
Who is Orodreth's sister?