Mu'nis
Mu'nis (مؤنس) means 'one who brings comfort or companionship,' derived from the Arabic root w-n-s related to sociability and intimacy.
Yes. Mu'nis is attested in classical and medieval Arabic onomastic records and continues to appear, albeit rarely, in modern usage.
No. The specific name Mu'nis does not occur in the Quranic text, though the root w-n-s appears in Arabic vocabulary.
Yes. Mu'nis carries a positive meaning within Arabic lexical tradition and is used as a Muslim masculine given name; it has no theological prohibition and is respectful in usage.
Some families use short forms such as Munis or Mounis in everyday speech; formal registration usually uses the full form Mu'nis (مؤنس).