This song started out in the later 17th century, and the hero of the original was a Frenchman, executed in 1670. Elements of the separate Flash Lad songs have crept into it since. Details in the thread Q links to above.

The Traditional Ballad Index entry relates to the other song family rather than to this one, though the later overlaps between them obviously create confusion. So far they seem to be considering them to be variants of the same song (and, effectively, late forms are; though by a process of convergence), but they probably aren't aware of the broadside history yet.