Sandhiyaa-> Sand(h)iya -> Sand(h)iy -> Sand(h)i -> Sand(h)y -> Sandy
If you stay here for ever and have your lineage remember your name "Sandhya", with all known corruption and rules of sound, the name would become Sandy.
I have applied all known rules of Sanskrit and Lingusitcs.
Shiva-Yoni means the Female Counterpart of the Shiva-Lingam, the Male Principle.
Shiva-Yoni -> Shivyoni -> Shavyone ->Shavonne -> Shavonnye
Indian Corruption -
Shiva-Yoni -> Shivayoni ->Shivyoni -> Shivoni -> Shibani -> Shibaani -> Shivaani
o -> au (well known Sanskrit Sandhi rule)
y + o -> y + au -> y + a - > ya (well known Sanskrit vowel Sandhi Rule)
va + ya -> v + y + a -> v + a ( colliquising of the vowels by the common masses who are uninitiated into grammer and linguistics).