Hyades: With sorrow came rain
The Hyades were the daughters of Atlas and or Aethra, and sisters to the Pleiades and the Hesperides. They were a sisterhood of nine nymphs responsible for bringing rain. Their names were Phaesyle, Ambrosia, Cleeia, Coronis, Eudora, Pedile, Phaeo, Phyto, and Polyxo.
According to the myth while hunting, Hyas, their older brother and famed archer was killed by his own pray. The Hyades mourned his death with so much vehemence and dedication that it rained across the earth and finally died from sadness. Zeus in respect for their dedication and family love turned them into stars. This is how they acquired their name and became bringers of rain. Their name has been given to a start cluster on the head of Taurus constellation which ancient Greeks considered to be a warning of rain when it rises and sets.
Horae: The wielders of time and seasons
Moirae: The wielders of fate
In Greek mythology the Horae were the three daughters of Zeus and Themis, Eunomia, Diké, and Eirene, who were law-and-order goddesses.
Morpheus: Even gods need to dream
The Moirae in Greek mythology are the personifications of destiny. Same as the Charites and the Hesperides, they were three, Clotho, Atropos and Laxesis. They controlled the thread of life of every mortal from birth to the end.
Naiads: The spirits of the springs
Morpheus is the son of Nyx, the primordial goddess of the Night. He is the god of dreams, the older and master of the Oneiroi.
Oceanids: Three thousand sisters
The Naiads, probably daughters of sea god Poseidon, were nymphs who presided over fountains, springs and streams. The Naiads were neither river goddesses nor ancient spirits that inhabited the still waters of marshes.
The Oceanids were the daughters of the Titans Oceanus and Tethys. They were plenty in number, too many to be counted. Each of the three thousand daughters was the patroness of a spring, lake, pond, pasture, or flower.