Calliope, in Greek mythology, is one of the nine muses, whose parents are Zeus and Mnemosyne.
Echo's mother was not named inn Greek Mythology. Her fathers name was Penaeus.
Hecate was an underworld or moon goddess in Greek mythology. Her parents have been listed as either Perses and Asterie or Zeus and Asterie among others.
Ouranos and Gaia.
Venus and Mars are Cupids mother and father.
The Gryphon didn't have it's origins in Greek mythology, so it is rarely mentioned and has no recorded lineage. If it were to have parentage, it would likely have been Typhon and Echidna, the parents of most of the monsters in Greek Mythology.
Yes, in Greek mythology, Leto's parents were the titans Phoebe and Coeus.
"A sound."
Atalanta was the daughter of Iasus and Clymene.
Iapetus was a Titan who was the son of Uranus.
Pistis, Greek goddess of Faith, is never mentioned to have parents or siblings.
Supposedly she is the daughter of Gaea and Uranus according to The Wordsworth Classic Dictionary and The Dictionary of Classical Mythology.