The son of Vasu was Pratīka, whose son was Oghavān. Oghavān’s son was also known as Oghavān, and his daughter was Oghavatī. Sudarśana married that daughter.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
वसोः प्रतीकस्तत्पुत्र ओघवानोघवत्पिता । कन्या चौघवती नाम सुदर्शन उवाह ताम्
vasoḥ pratīkastatputra oghavānoghavatpitā | kanyā caughavatī nāma sudarśana uvāha tām
SB 9.2.18