'Nilesh' means 'the Blue God',
and is one of the
alternate names for Vishnu, "The Preserver."
Later, the name was also used to refer to Shiva, "
The Destroyer of Evil", "The King."
The name is a
combination (sandhi) of two words: Neel ("blue") and Ish ("Lord" or "God").
Ish or Esh is also a Sanskrit word for head. Hence, the name can also be interpreted as 'Blue Head,' which refers to Lord Shiva.
Nilesh also refers to a third deity: Krishna. Krishna is also referred to as the Blue God because of the darker skin which is always displayed in pictures and statues in the colour blue.