We discussed the background for Belladonna's name on
this thread, so I won't go into that here.
I found it interesting to look up her sisters' names on the family tree, since they are not mentioned elsewhere: Donnamira and Mirabella. That is a chain of syllables, and each sister shares half of her name with each of the others. However, that is not really relevant to this chapter...
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'Mercy!' cried Gandalf. 'If the giving of information is to be the cure of your inquisitiveness, I shall spend all the rest of my days in answering you. What more do you want to know?' 'The whole history of Middle-earth..
.'