What happens when a testator bequeaths a relative share or part of his estate to his heirs according to law ?
The beneficiary will get the relative share under the will instead of what he would have received according to law, and not in addition to it.
Can a testator deliberately include a person in his will so that he gets inheritance from two sources – under his will, and according to law ?
Yes !
Can a beneficiary calculate that it is more worthwhile for him to relinquish his share under a will in order to get a better inheritance share under law – and actually do so in practice ?
Yes ! There is nothing to stop a beneficiary from giving up a small inheritance under a will to gain a greater one , according to the law.