The Silmarillion
When "The Silmarillion" was initially published, Finrod is identified as the brother of Galadriel, Angrod, Aegnor and Orodreth. Orodreth is retroactively reconstructed in later publications as the son of Angrod and Eldalótë, which makes him Finrod's nephew instead; this reversed a prior editorial decision by Christopher Tolkien made for "The Silmarillion" on the grounds that the later revision was not fully integrated into the extant texts by his father.