Apollo is part of the greek myths about gods and goddesses so yes
In ancient Greek religion Apollo and other gods and goddesses dwell on Olympus.
a temple like most greek gods and goddesses
Well, there were no two ancient goddesses that were twins. However, the Greek goddess Artemis was the twin sister of Apollo.
Although of Greek origin, Apollo is the Roman god of healing. Epona and Angita were also goddesses of healing.
Apollo's name in other cultures would be the same! That's because the greek and roman made the gods and goddesses.
There were many Greek gods and goddesses, but there were 12 main Olympian gods and goddesses. They included: Zeus, Poseidon, Hades, Hera, Athena, Aphrodite, Hypotheses, Dionysus, Apollo, Artemis, Ares, and Hermes.
You probably mean the nine muses, goddesses of the arts and of creativity, each muse had their own specialty in the arts. And the God with them is Apollo
Apollo is the name in both Greek and Roman mythology.
A Greek myth is a myth is like information on Greek Gods/Goddesses. For example, Zeus, Hercules, Cyclops, Apollo, Athena, Hades, Poseidon, Hermes, Aphrodite, Pan, Rhea, Pegasuses, Sirens, Medusa, Triton, and all of the other Greek Gods and Goddesses.
There is only ever 12 greek gods/goddesses at one time, however many greek believed in roman gods, but the main 15 greek gods/ goddesses are: Aphrodite Apollo Ares Artemis Athena Demeter Dionysus Eros Hades Hephaestus Hera Hermes Hestia Poseidon Zeus
Norse mythology and Greek mythology are unrelated.