FRANK-MARRIAGE, in law, is where tenements are given by one man to another, together with a wife, who is the daughter or cousin to the donor, to hold in frank-marriage. By such gift, though nothing but the word frank-marriage is expressed, the donees shall have the tenements to them, and the heirs of their two bodies begotten; that is, they are tenants in special tail. For this one word, frankmarriage, denotes, ex vi termini, not only an inheritance, like the word frank-almoigne, but likewise limits that inheritance; supplying, not only words of descent, but of procreation also. Such donees in frank-marriage are liable to no service but fealty; for a rent reserved therein is void until the fourth degree of consanguinity be past between the issues of the donor and donee.