“the son’s inheritance” is correct.

Yes, @papayalily is right. The “the son’s inheritance” is correct. The “inheritance” or “to inherit” always refers to what is received by a person.

Wow, thanks so much, that clears it right up for me.

Son’s inheritance – Father’s estate. The son may inherit part or all of his father’s estate.

It’s the son’s inheritance from his father. The son may also inherit from others.

Are we looking for the correct LEGAL terms here? Because if there’s a will, there technically isn’t any inheritance – and heirs and inheritance can never exist until the person is actually dead. Heirs are a product of an intestate death.

So, if

(1) there is no will, you can figuratively refer to what, under state law, will pass to the son if the father dies intestate, but this is literally incorrect unless the father is already dead. It is often also nonexistent if there is a surviving spouse at the time of death.

(2) there is a will, or a trust that a will pours into, etc., it is probably better to refer to the son’s claim to the estate as a beneficiary.

You could also try using the father’s “legacy.”

Try “Father’s bequeathal or bequeathment”

@TheTinman I don’t know about that one. That’s a pretty awkward construction.