Eurydome
According to Lucius Annaeus Cornutus' Compendium Theologiae Graecae, Eurydome  (Ευρυδόμη; "Structure Outside the Areas") was the mother of the Graces by Zeus (a role normally attributed to the similarly named Eurynome). Notes

References 
 Torres, José B., Lucius Annaeus Cornutus: Compendium de Graecae Theologiae traditionibus, Bibliotheca Teubneriana, Berlin, De Gruyter, 2018. Online version at De Gruyter. Greek goddesses
Divine women of Zeus