I believe that Princess Di's stepmother's firstname was "Raine". The name "Rainee" can be a hippy name meaning, literally, "rainy". Or, it can be a name derived from the names
Rain ,
Raina ,
Rayna , or
Reina . It can even be a feminine diminutive of the name
Reginald .
Click on each of the blue names above, to find their meanins on this site.
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Nanaea