Yourn

Origin

From English dialectal, from your + -n, formed on analogy with mine, thine. Compare hisn.

Pronoun

1. (obsolete or dialectal) yours.
• 1914 , Edgar Rice Burrows , The Mucker Chapter , Your room's in there, back of the office, an' you'll find some clothes there that the last man forgot to take with him. You ken have 'em, an' from the looks o' yourn you need 'em.