• Vinami is not described as a grandson or great-grandson of Rishabhanath. In Jain texts, Vinami is listed as one of the Ganadharas (chief disciples) of Rishabhanath, i.e., a senior student who expounded his teachings to others. This makes Vinami a close follower in the teaching lineage, not a dynastic descendant. So the question of him being a grandson/great-grandson does not apply in the usual sense of family lineage.

• As for lineage, Bharata and Bahubali are both sons of Rishabhanath (they are brothers). Ganadharas like Vinami belong to the teaching lineage that comes from Rishabhanath’s era, and their status is separate from the royal line of Bharata/Bahubali. In short: Vinami is not part of Bharata’s or Bahubali’s direct descendant line; he is a Ganadhara of Rishabhanath and thus part of the Ikshvaku dynasty’s broader Jain narrative, not a grandchild of Bharata or Bahubali.

If you want a deeper Jain text perspective, you can explore the Mahavira and Adinath sources where Ganadharas are listed and described, but keep in mind Vinami’s role is as a Ganadhara, not as a dynastic descendant.