What is a Ikshvaku (Suryavanshi) dynasty in the Jain tradition, why is it called Solar dynasty? Who in the Jain tradition belongs to the solar dynasty, and who is to the lunar dynasty?

• What is Ikshvaku (Suryavanshi) in Jainism

- Ikshvakuvaṁśa, also called the Suryavanshi or Solar dynasty, is a major lineage in Jain cosmology. It is named after Ikshvaku, the founder of the dynasty, who is identified with Rishabhanatha, the first Tirthankara of Jainism. In Jain texts, many Tirthankaras are said to have been born in this dynasty (the Ikshvaku lineage). The Sun god Surya is often described as the family deity of this line, which is why it is called the Solar dynasty. In short: Solar = Ikshvakuvaṁśa = Rishabhanatha’s line. ( en.wikipedia.org)

• Why it is called the Solar dynasty

- Because the dynasty’s clan deity is Surya (the Sun), and the kings of this line are traditionally described as “Suryavanshi” (of the Sun lineage). In Jain sources, Rishabhanatha is the founder of this lineage, which is repeatedly called the Ikshvakuvaṁśa or Suryavanshi. ( en.wikipedia.org)

• Who in Jain tradition belongs to the Solar dynasty

- Rishabhanatha (Ikshvaku) is the founder of the Ikshvakuvaṁśa. - Many subsequent Tirthankaras are said to belong to this dynasty, including Padmaprabha, Suparshvanatha, and Abhinandanananatha, among others listed in Jain genealogies as born into the Ikshvaku lineage. The exact list of Tirthankaras assigned to this dynasty can vary slightly among sources, but the pattern is that numerous Tirthankaras are described as being Ikshvakuvaṁśi. ( en.wikipedia.org)

• Who is in the Lunar dynasty (Chandravansha) in Jainism

- The Lunar dynasty (Chandravansha) is the other main line in Jain tradition. It traces descent from the Moon (Chandra) and Purva/Hindu genealogies describe its origin differently from the Ikshvaku line. In Jain texts, some Tirthankaras and figures are associated with the Chandravansha as well, but the Solar/Ikshvaku line is the one most frequently connected with a large number of Tirthankaras. The exact assignments can differ between Digambara and Śvētāmbara traditions. Mahavira is commonly presented in Jain sources as belonging to the Lunar (Chandravansha) line, contrasting with the many Ikshvakuvaṁśi Tirthankaras in the Solar line. ( en.dharmapedia.net)

• A key point for both traditions

- Jain tradition emphasizes two main legendary dynasties: Ikshvakuvaṁśa (Solar) and Chandravaṁśa (Lunar). Rishabhanatha is the archetypal founder of the Solar line, and the Solar line is said to include many Tirthankaras; the Lunar line is the other major lineage. The two lineages are part of Jain cosmology, and there are slight differences in how Digambara and Śvētāmbara traditions enumerate who belongs to which line and which Tirthankaras come from each.

If you’d like, I can point you to a JainKnowledge page that explains Ikshvaku/ Solar dynasty in more detail.