Definition of "traitorous"

I tel you true my hart is ſwolne with wrath,On this ſame theeuish villain Tamburlain.And of that false Coſroe, my traiterous brother,Would it not grieue a King to be so abuſ’d?

c. 1587–1588, [Christopher Marlowe], Tamburlaine the Great. […] The First Part […], 2nd edition, part 1, London: […] [R. Robinson for] Richard Iones, […], published 1592; reprinted as Tamburlaine the Great (A Scolar Press Facsimile), Menston, Yorkshire, London: Scolar Press, 1973, (please specify the page)

I that inceſtuous, that adulterate beaſt, / With witchcraft of his wits, with trayterous gifts, / O wicked wit, and giftes that haue the power / So to ſeduce; wonne to his ſhamefull luſt / The will of my moſt ſeeming vertuous Queene; [...]

c. 1599–1602 (date written), William Shakespeare, The Tragicall Historie of Hamlet, Prince of Denmarke: […] (Second Quarto), London: […] I[ames] R[oberts] for N[icholas] L[ing] […], published 1604, [Act I, scene v]