someone who receives a share of someone else's property after they die
Actions filed by the legatee concerning property must be filed within eight years of the death of the deceased.
someone or something that receives a position, title, political power, or property etc that is left or handed down by someone who owned it before. NB In this meaning of the word legatee/i> the term successor is more common.
She is the obvious political legatee to the current Prime Minister.