Zeus’s parents were both Titans, children of Uranus (Sky) and Gaea (Earth).
Zeus’s mother was Rhea; his father was Cronus.
Fearing that one of his sons would overthrow him, Cronus swallowed his five other children, but Rhea rescued Zeus and had him raised in secrecy in a cave.
Eventually Zeus tricked Cronus into vomiting up the other children and overthrew the old god.