yow

[you]

interjection, noun

Origin of yow

late Middle English word dating back to 1400–50

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

If I do not come to yow at fyve, you are not to tarry for me, but to fall on.
The Jacobite Rebellions (1689-1746)
James Pringle Thomson
In MS. G, "that yow and all they that hes done, and dois as ye do, sall."
The Works of John Knox, Vol. 1 (of 6)
John Knox
Yow say, It is nott so; but I will wynne it throw my awin werkis.
The Works of John Knox, Vol. 1 (of 6)
John Knox
“Yow weant move her like that, I tell you, lad,” said Hickathrift.
Dick o' the Fens
George Manville Fenn
Now then, what are yow gimbling (grinning) at, young mester?
Dick o' the Fens
George Manville Fenn

exclamation, with various meanings, mid-15c.