पित्रभावे भ्रातरो भ्रातृपुत्राश्च ॥ कZ_०३.५.१२ ॥
pitrabhāve bhrātaro bhrātṛputrāś ca
If the father is absent, the brothers and the brothers’ sons (inherit).
Continuity of property within the natal lineage and administrable proximity of kinship for succession.