Problem is, the name is something like “Hencha”.
What is the solution? Transliterate to Hadassah!! Period!!
It will work beautiful & fine. Never give double name. Not only is it a pain for the child, but also a pain for his/her children when having to use multiple names in a MisheBerach or Kesuvo or Aliya etc.
Somebody who does have a double name, Halachically is really supposed to utilize this double name each & every time.