heir

/ɛr/

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

中文释义：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。