I haven't been doing genealogy lately.
I have found no record to prove that Marmaduke was son of Nathan of N C though I suspect that he is. As far as I have been able to find there is NO record of who Henry's parents were . He may have come from the Mass. Lamb family but there is no record that I have found. In the south or in Mass.
I have also never found a record to prove Marmadukes name was Nathan other than a decendant saying that.
I am sure it was possibly his name but without proof.