If you're looking for a similar-sounding English name, you could consider:
* Maura: Irish name meaning "bitter" or "dark".
* Mira: Short for "Miriam," Hebrew name meaning "beloved" or "wished for".
* Myra: Greek name meaning "myrrh," a type of fragrant resin.
Ultimately, the best English translation depends on the specific meaning and context of "Mithura" in your situation.