Caladbolg

154-155  Ailill returns the sword to him before the final battle, and Fergus speaks a poem over it, calling it Caladcholc in one version,[3]: pp.

[3]: 234–235 A poem in the Duanaire Finn traces the ownership of sword through various figures of classical mythology and history, passing down from Saturn, via the heroes of the Trojan War, to Julius Caesar, to Cú Chulainn, who gave it to Fergus.

After Fergus's death, it was passed down through the generations from Medb, to Fionn mac Cumhaill's grandson Oscar, and ultimately to Saint Patrick.

[5] T. F. O'Rahilly argues that Caladbolg is the older form of the name, and interprets it as meaning "hard lightning".

[7][8] The name Caladbolg appears in the plural as a generic word for "great swords" in the 10th-century Irish translation of the classical tale The Destruction of Troy, Togail Troí.