heir

/ɛr/

a person who is entitled by law or by the terms of a will to inherit the estate of another

Chinese meaning: 继承人；后嗣

The eldest son is often considered the legal heir to the family estate.

长子通常被视为家族财产的法定继承人。

She was named the sole heir in her grandmother's will.

她被祖母的遗嘱指定为唯一继承人。