Uranus was the god of the sky for the Greeks and was killed by Cronus or Khronus or whatever you'd like to call him. The Romans actually found the story of Orpheus exceedingly boring because they were more warlike than the Greeks. So they decided that they would not retell the story of Orpheus so he never had a roman name. He remained Orpheus for all time.
Helios was the Greek name. His name was Sol in Roman mythology.
Greco-Roman mythology.
Apollo's name in both Greek and Roman mythology was Apollo.
Midas was never a greek god. He was a friend of Dionysus who was granted a wish. His name is the same in Roman and Greek mythology.
Morpheus' Roman name is the same as it is in Greek mythology.
Prometheus and Epimetheus were Greek gods.
Apollo's name in both Greek and Roman mythology was Apollo.
Juno's name in Greek mythology was Hera.
Ulysees
Mercury's Roman name is Mercury. And his Greek name is Hermes.
Apollo's name remains the same in Roman mythology. He is known as Apollo in both Greek and Roman mythologies.
No, Gaea does not have a different name. In both Greek and Roman mythology, her name is Gaea.