ἀγκών

Greek word for "elbow." Lapide explains that the Roman name Ancus derives from this Greek word, since Ancus was named from his crooked elbow, according to Festus.

Commentary on the Pentateuch of Moses

• Canons Bearing a Torch Before the Pentateuch — The Roman name Ancus derives from the Greek word for elbow

  "Ancus was named from his crooked elbow, says Festus — for "elbow" in Greek is called ankon"