The Venkatachala Mahatmya of the Skanda Purana describes how Venkateshwara (the Vishnu deity in Tirupati, AKA Balaji or Srinivasa) meets Padmavathi for the first time. He saves Padmavathi from an elephant, and when Padmavathi and her friends ask him who he is, he says this (from page 24 of this excerpt):
Those conversant with ancient traditions say that our family is that of the Sun. Our names are innumerable. They sanctify learned men. By colour and name the ascetics say that I am Krishna. My discus instills fear in the minds of the enemies of Suras and those who hate Brahmanas. On hearing the sound of my conch enemies become confounded. Even among immortal beings there is no bow equal to mine.
My question is, why does Vishnu say his "family is that of the Sun"? Vishnu is actually an ancestor of Surya the sun god, not a descendant; Surya is the son of Kashyapa, who is the son of Marichi, who is the son of Brahma, who is the son of Vishnu. So I don't see how it makes sense to call Vishnu a member of the family of the Sun.
There are two possible reasons that I see:
Can anyone shed light on what Vishnu meant?