Definition of "craythur"

Now Tim had a sort o' the tipplin' way / With a love of the liquor poor Tim was born / And to help him on with his work each day / He'd a drop of the craythur ev'ry morn.

1850 (approx.), Anonymous, Finnegan's Wake

[...] why, at home, if a craythur hasn't a hat to pull, he'll pull the hair off his head, sooner than not make a bow.Shut ye'r mouth, do, and go on, ye little ill-reared winkle; [...]

1857, Anna Maria Hall, A woman's story, page 215

Then he answered thickly, "Och, sure, and it's far enough from well it is, yer honour, and it's far enough from well yer honour would be if he'd seen the soights that Pathrick Moriarty, as harmless a craythur as ever was born, has seen thi noight."

1901, “Water-Kelpies”, in Country Life, page 471