(a) Used absol.: theirs, their own, of them; their property, their folly, etc.; thei (hem) and heren, they (themselves) and their households; heren sheppend, the Creator of them; of heren, belonging……
Referring to a male human antecedent: his, of him: (a) modifying a noun which denotes something owned or something in one's charge or keeping; (b) modifying a noun denoting a part; his arm, his soule,……