Vasudeva Vishnu

Vasudeva-Vishnu in a fourth century engraving written in the Bactrian Script. 

I think the Vasudeva-Vishnu coins and temple inscriptions in Bactria is an understudied area that relates to the Pancharatra agama and Jyotish. Notice the creation mythology in Surya Siddhanta has Pancharatra terminology and so does Brihat Parashara Hora Shastra.