In Roman religion Opis (in classical religion, Ops in archaic religion) became associated with Rhea because Saturn became associated with Cronus, whose wife was Rhea.
Rhea in early traditions was known as "the mother of gods" and therefore is strongly associated with Cybele, who had similar functions. Therefore, the Romans also associated Magna Mater (Great Mother) with Rhea. This is the name the Romans gave to Cybele when they adopted her during the Second Punic War.
Ceres, the Roman goddess of crops and fertility, is the counterpart of Greek Demeter, sister of Zeus, and the daughter of Cronus and Rhea.
Venus is Aphrodite's Roman counterpart.
Athena's Roman counterpart is Minerva.
Cupid was the Roman name. His Greek counterpart was Eros.
He didn't have a Roman counterpart and you are already using his Latin name. In Greek his name was Heracles.
Rhea is a Greek goddess and so has no Greek counterpart. Ops/Opis was the Roman counterpart.
Ceres, the Roman goddess of crops and fertility, is the counterpart of Greek Demeter, sister of Zeus, and the daughter of Cronus and Rhea.
Ops was the sister and wife of Saturn and the mother of Jupiter, Juno, Ceres, Pluto, Neptune and Vesta. Her Greek counterpart was Rhea.
Athena's Roman counterpart is Minerva.
Venus is Aphrodite's Roman counterpart.
Athena's Roman counterpart is Minerva.
Demeter's Roman counterpart is Ceres.
Cupid was the Roman name. His Greek counterpart was Eros.
Diana was the Roman counterpart of Artemis.
The Roman counterpart of Zeus is Jupiter or Jove.
First of all, the Roman counterpart came from Hermes, not the other way around. Second, the Roman counterpart of Hermes is Mercury.
Apollo is the roman counterpart for Apollo his name doesn't change