Who can be a guardian in a minor's marriage in Sunni Law ?

Under Sunni (Hanafi) law, the right to contract a minor in marriage (jabar) belongs, in order, to the father, the father's father how high soever, the brother and other male paternal relations, and only after them to the mother and maternal relations.

The father is therefore the first guardian for marriage. A mother, grandmother or maternal uncle cannot act while a guardian higher in the order, such as the father, mother or paternal uncle, is present.