An oak - “The oak,” indicating it as a well-known tree, still standing in the writer’s days.
There was another Ophrah in Benjamin Joshua 18:23. This Ophrah was in Manasseh, and was the village of Joash, the head, apparently, of the family of Abiezer, which was one of the families of Gilead, the son of Machir, the son of Manasseh Numbers 26:30.