Drob Derg (modern spelling: Crobh Dearg; pronounced crove derg) is a Celtic goddess, in Scottish, Irish and Welsh mythology. Her name means "red claws". She is one of the harvest goddesses, and is also known as, or linked to, Lassi (Flame), Lassar Fhína, and/or Lasairíona (Fire of Wine). There is a well in Ireland named after her.
She was a war  goddess and sister of Latiaran. It is possible her name was an alternate form of the Goddess of War Badb. Leinster fortress was named after her.