Who was a two faced sun god?

In Roman mythology, the two-faced sun god is known as Janus. He is often depicted with two faces looking in opposite directions, symbolizing transitions, beginnings, and endings. Janus is associated with doorways, gateways, and the passage of time, embodying the duality of looking back at the past and forward to the future. While he is not solely a sun god, his association with light and new beginnings aligns with solar symbolism.