It is a heiress.
A female heir is commonly referred to as a heiress.
The female heir is called the heiress.
heiress
An Heiress.
The opposite of heir is heiress. Heir is the male beneficiary while a heiress refers to a female who is to inherit wealth.
If you looked in most dictionaries you would find that a female heir was traditionally called an heiress.
The feminine version of heir is heiress.
One alternative term for a female heir is "heiress".
"Heir" is a gender-neutral term that can refer to a male or female being inheriting something, such as a title, property, or responsibilities. The gender of the heir would depend on the specific context or individual situation.
heiressHeiress
Heiress
Heiress