Jure uxoris is a Latin term that means "by right of his wife" or "in right of a wife". It is commonly used to refer to a title held by a man whose wife holds it in her own right. Similarly, the husband of an heiress could become the possessor of her lands jure uxoris, "by right of [his] wife". Jure uxoris monarchs are not to be confused with kings consort, who were merely consorts of their wives, not co-rulers.
Middle Ages[]
In common-law, Jure uxoriswas standard in the Middle Ages, even for Noblewomen have the estates by her own right. When a Nobleman married an heiress, he obtained the estates through her, retaining it after her death. His heir inherited and recieved their titles. The freehold estate of a husband in real property of which his wife is, at the time of the marriage, seised in fee or in which she has a life estate. It is the real estate of which the wife becomes seised after the marriage.
It is an estate in the right of the wife, entitling the husband to the possession, use, income, and usufruct of the property, but not continuing beyond the death of either of the spouses. As regards the common law freehold estate jure uxoris, the husband and wife together have the whole estate, and therefore in law they are both considered as seized in fee, and must so state their title in pleading.