Howkey or Horkey

Does the following passage from Sir Thomas Overbury's *Witty Descriptions of the Properties of sundry Persons*, first published, I believe, in 1614, afford any clue to the etymology of this word? It occurs in the description of a Frankling or Yeoman:— "He allows of honest pastime, and thinks not the bones of the dead anything bruised or the worse for it, though the country lasses dance in the church-yard after even-song. Rock-Monday, and the wake in summer shrovings, the wakeful catches on Christmas eve, *the hoky or seed-cake*, these he yearly keeps, yet holds them no relics of Popery." As I…