Hey Ho!

I am a newbie to this forum but am looking for anyone's input. Sometime ago, I was perusing through one of Christopher Tolkien's book on his Father's work and thought I came across a footnote that said that J.R.R. had considered giving Eldarion a younger brother and even had a name for him which was given in the footnote. Now, however, as I researching for my own fun and amusement, I am unable to find this footnote, if it was that, again. Was I imagining this footnote in the first place or did I actually see it? I have found the reference to Eldarion's two sisters, but nothing else. Does this jog anyone's memory and thereby alleviate my frustration? Thanxs!