Polygyny may also result from the practice of levirate marriage. However Genghis Khan had allowed remarriage of widows including the levirate. Levirate marriage is a tradition related to posthumous marriages or ghost marriages. All tribes practiced sororate and levirate marriages. The practice of levirate marriage is strongly associated with patriarchal societies. Levirate is practised in Kurdistan&colon; a widowed woman stays with her husband's family. Agnes felt neglected in her unfruitful Levirate marriage, the only such marriage of Smith. The levirate custom was revived if there were shaky economic conditions in the decedent's family. Kalankatuatsi describes the form of levirate marriage practised by the Huns. Yet another complex levirate marriage has often been invoked. This form of marriage is called levirate. Levirate marriages will sometimes be performed to give support to the widows and their children. "Yibbum" is the form of levirate marriage found in Judaism. For example, levirate marriage does not exist among Hutterites. However, in case of woman, levirate applies mainly to widows.