The inhabitants of the lowest deva world. his world derives its name from the Four Great Kings (Cattāro Mahārājāno) who dwell there as guardians of the four quarters: Dhataraṭṭha of the East, Virūḷhaka of the South, Virūpakkha of the West, and Vessarana of the North. DN.ii.207f. DN.iii.194f. They keep large retinues consisting, respectively, of Gandhabbas, Kumbhandas, Nāgas and Yakkhas, all of whom dwell in the same world as their lords and accompany them on their travels. These kings are mentioned DN.ii.257f. as having undertaken the protection of the Buddha from the moment of his conception in his mother’s womb, and in the Āṭānāṭiya Sutta, they appear as protectors not only of the Buddha but also of his followers.
The Four Kings appear to have been regarded as Recorders of the happenings in the assemblies of the devas. DN.ii.225 On the eighth day of the lunar half-month, they send their councillors out into the world to discover if men cultivate righteousness and virtue; on the fourteenth day they send their sons, on the fifteenth day they themselves appear in the world, all these visits having the same purpose. Then, at the assembly of the devas, they submit their report to the gods of Tāvatiṃsā, who rejoice or lament according as to whether men prosper in righteousness or not. AN.i.142f.
These four Gods surpass the other inhabitants of their worlds in ten ways—beauty, length of life, etc.—because their merit is greater than that of the others. AN.iv.242
Beings are born there as a result of various acts of piety and faith which, however, are based on motives not very exalted. AN.iv.60