I dont know why you feel like changing your name , but still there might be some reason which you might be knowing. So I would suggest you the last option i.e. Maneesh as as its nearly same to your original name which is present here.
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Irrespetive of the spelling Manish or Maneesh the meaning of the name remains the same i.e. "The God of the Mind". So instead of changing the spelling, try to simply justify the meaning of your name by your deeds.