1) The past of the verb to owe.
1496 for the tendir love that he hath ought to my husbond, York
1521 iijs iiijd that his fader owght me, Pontefract
1557 Detts that the testator ought the daye of his dethe, Thornton Bridge
1685 his father ought him seven shillings for lamb summering, Gargrave
1727 Daniel Brear ought him money, Bradford.
2) Anything, a variant spelling of aught, still in regular use.
c.1570 yf owght be gone than neds not Ile complayne to hadywiste [had I known], Woodsome
1786 one mason dressing Stones at Stonepit ... Joseph Pogson there for ought I know, Slaithwaite.