Mahārāja Ikṣvāku: One of the sons of Vaivasvata Manu. He had one hundred sons. He prohibited meat eating. His son Śaśāda became the next king after his death.
Manu: The Manu mentioned in this verse as the father of Ikṣvāku is the seventh Manu, of the name Vaivasvata Manu, the son of sun-god Vivasvān, to whom Lord Kṛṣṇa instructed the teachings of Bhagavad-gītā prior to His teaching them to Arjuna. Mankind is the descendant of Manu. This Vaivasvata Manu had ten sons, named Ikṣvāku, Nabhaga, Dhṛṣṭa, Śaryāti, Nariṣyanta, Nābhāga, Diṣṭa, Karūṣa, Pṛṣadhra and Vasumān. The Lord's incarnation Matsya (the gigantic fish) was advented during the beginning of Vaivasvata Manu's reign. He learned the principles of Bhagavad-gītā from his father, Vivasvān, the sun-god, and he reinstructed the same to his son Mahārāja Ikṣvāku. In the beginning of the Tretā-yuga the sun-god instructed devotional service to Manu, and Manu in his turn instructed it to Ikṣvāku for the welfare of the whole human society.
Lord Rāma: The Supreme Personality of Godhead incarnated Himself as Śrī Rāma, accepting the sonhood of His pure devotee Mahārāja Daśaratha, the King of Ayodhyā. Lord Rāma descended along with His plenary portions, and all of them appeared as His younger brothers. In the month of Caitra on the ninth day of the growing moon in the Tretā-yuga, the Lord appeared, as usual, to establish the principles of religion and to annihilate the disturbing elements. When He was just a young boy, He helped the great sage Viśvāmitra by killing Subahu and striking Mārīca, the she-demon, who was disturbing the sages in their daily discharge of duties. The brāhmaṇas and kṣatriyas are meant to cooperate for the welfare of the mass of people. The brāhmaṇa sages endeavor to enlighten the people by perfect knowledge, and the kṣatriyas are meant for their protection. Lord Rāmacandra is the ideal king for maintaining and protecting the highest culture of humanity, known as brahmaṇya-dharma. The Lord is specifically the protector of the cows and the brāhmaṇas, and hence He enhances the prosperity of the world. He rewarded the administrative demigods by effective weapons to conquer the demons through the agency of Viśvāmitra. He was present in the bow sacrifice of King Janaka, and by breaking the invincible bow of Śiva, He married Sītādevī, daughter of Mahārāja Janaka.