"Nahida" is likely based on Nahid (Persian: ناهید Nâhid), a Middle Persian variant spelling of Anahita, a Zoroastrian goddess. Anahita is the goddess of "the Waters" (Aban) and is associated with fertility, healing, and wisdom.
In-game, both "Anahitian" and "Nahidad" are terms affiliated with the Dendro Archon(s), although the terms have only been used generically and have not been ascribed to refer to a specific Dendro Archon.
Anahitian Blessing is described as the Dendro Archon's blessing.
In Sohreh's Note, the eponymous Sohreh decides to name a new species of micro-scarab "Nahidad Scarabs," and proceeds to explain that the name means "The Dendro Archon's Boon."