What is the blood relative who would marry the wife if the father of the mongol family has died?

In traditional Mongol culture, if the father of the family passes away, the wife's blood relative who would typically marry her is often her brother or a close male relative, such as a cousin. This practice is part of the levirate marriage custom, where a man marries the widow of his deceased brother or relative to ensure the continuation of the family lineage and provide support for the widow and her children.