Smell of a spell - Ah, I must have remembered that!
As for the nephews - I may recall two dukes in 'minor works' - Beorhtnoth (duke of Essex), and Dodinel de Sauvage (same as Doddinaual de Sauage) duke of Clarence.
Or, to be truly honest, I may recall one duke (that is, Beorhtnoth) and I've looked up another one
I can recall no nephews, though. And haven't found any, besides Gawain himself, who is not duke's nephew, but King's nephew. Also several other noble knights, equally Arthur's nephews.
But should I recall nephews at all? I should not, obviously - point being, the chap was
not a nephew?
um... I certainly feel like another hint here