[Facts] Re: Mahwish or Mahwush
It's natural for the following /i/ to force the preceding a to be pronounced as /æ/ or /e/ in a process known as levelling. the alternate Mahwush may be pronounced Mohwush or Muhwush for the same reason. In such cases where the spelling doesn't change even though the pronunciation does in certain situations, we would say that /a/ and /e/ are allophones.