Nārada’s Arrival, the Nine Yogendras, and the Foundations of Bhāgavata-dharma
तेषां नव नवद्वीपपतयोऽस्य समन्तत: । कर्मतन्त्रप्रणेतार एकाशीतिर्द्विजातय: ॥ १९ ॥
teṣāṁ nava nava-dvīpa- patayo ’sya samantataḥ karma-tantra-praṇetāra ekāśītir dvijātayaḥ
Nine of the remaining sons became rulers of the nine islands of Bhārata-varṣa and exercised full sovereignty. Eighty-one sons became twice-born brāhmaṇas and helped establish the Vedic path of ritual sacrifice, the karma-kāṇḍa.
The nine dvīpas, or islands, ruled by nine sons of Ṛṣabhadeva are the nine varṣas of Jambudvīpa, namely Bhārata, Kinnara, Hari, Kuru, Hiraṇmaya, Ramyaka, Ilāvṛta, Bhadrāśva and Ketumāla.
They are the rulers associated with the nine islands (dvīpas) who are described as surrounding the Supreme Lord; the verse highlights their honored presence in the Lord’s assembly.
To indicate that alongside rulers, there were also authoritative twice-born sages/brāhmaṇas who establish and teach the regulated Vedic paths of ritual duty, showing the social and spiritual order surrounding the Lord.
Respect authentic spiritual teachers and the discipline of dharma, while remembering that all social and religious systems find their true purpose when centered on the Supreme Lord.