I'm not going to lie,
Rae as a nickname for any of these names is frankly absurd. Most especially the ones where the r-sound isn't on it's own (like
Tristan. Tray is more likely, though unnecessary) or at the end of their syllable. But even for
Margery or
Rosalind,
Rae as a nickname is a stretch worthy of an Olympic gymnast.
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https://www.behindthename.com/pnl/120652