I think
Maren Isolde is a pretty, totally usable combo. I think
Isolde is usable. Sure, it reminds most people of
Tristan &
Isolde, but if you ever actually met someone named
Juliet,
Guinevere, Dulcinea, or
Isolde, surely you'd eventually begin to associate the name with that person & not the mythological character.
I wouldn't really worry about it, especially if you are only planning on using it as a mn.
My favorite combo with
Isolde in it at the moment is
Alannah Isolde, but I'm looking for a good combo with
Isolde as a fn too. =) It's a very pretty name.
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"The dog is a gentleman; I hope to go to his heaven, not man's."
- Mark Twain.