hisn

• his'n

From Middle English hisen, ultimately corresponding to an alteration of his after mine, thine.

hisn

1. (now dialectal, British and US, especially Appalachia) His. [from 15th c.]
   • 1748, [Samuel Richardson], “Letter XXXII”, in Clarissa. Or, The History of a Young Lady: […], volumes (please specify |volume=I to VII), London: […] S[amuel] Richardson;  […], →OCLC:

     I will not show him this letter of yours, though you seem to desire it, lest it should provoke him to be too severe a schoolmaster, when you are his'n.

   • 1848, James Russell Lowell, The Biglow Papers:

     An' every feller felt ez though all Mexico wuz hisn.

   • [1921 [1919], H. L. Mencken, The American Language, 2nd edition, New York: Alfred A. Knopf, →ISBN, →OCLC, page 297:

     But in the absolute whosen is often substituted, as in "if it ain't hisn, then whosen is it?" The imitation is obvious.]

• Hins, Nish, Shin, hins, nish, shin, sinh