1) A regional word used in descriptions of an animal’s skin colour, particularly cows. It has been said to mean flecked, speckled, spotted, and even pied (OED).
1552 to Agnes my dowghter one read spanged cowe, Wakefield
1558 to Mathewe Henrye son on spanged oxe calf, Whitkirk. Several variations in the vowel, and the word’s use as a noun have been noted: 1540 to ... my sone elawe [sic] a whit spanke, a cow, Houghton
1559 two bigge bullokes, a brownne and a spvnget, Treeton
1570 one spencket qwye, Grinton
1591 a whye stirke spinked, Wensley
1600 one blake spinkedd que styrke, Marrick
1756 1 Speng wye calf, Cawood.