M. D'Arbois maintained that the saga of Cúchulainn was known in Gaul.  Cúchulainn's name Setanta is akin to that of the Setantii, Celtic tribes living in the district between the Ribble and Morecambe Bay, and this, according to Rhys, suggests a British ancestry for the Irish hero.  D'Arbois, on the other hand, regards this folk, as well as the Brigantes, as of Belgic Gaulish provenance, while the latter had colonies in Ireland.  They had a well-known god, Esus, whom d'Arbois identifies with Cúchulainn; whence the story is of Gaulish origin, perhaps taught by the Druids; and it was ultimately carried to Ulster, where it was received with enthusiasm.  The identification rests on certain figured monuments, in the persons, names, or episodes of which M. d'Arbois sees those of the saga.  On one altar Esus is cutting down a tree, while on the same altar is figured a bull on which are perched three birds, this animal being entitled Tarvos Triganos—"the bull with three cranes" (garanus), unless the cranes are a rebus for the three horns (karenos) of divine animals.  On another altar from Trèves a god is cutting down a tree, and in its branches are a bull's head and two birds—a possible combination of the incidents on the other altar.  M. d'Arbois regards this as illustrating the Táin.  Esus, the woodman, is Cúchulainn; his action depicts what the hero did—cutting down trees to bar the way of Medb's host; "Esus" is derived from words meaning "anger," "rapid motion," such as Cúchulainn often displayed... (Mythology of All Races: Celtic, Slavic, Gray, v.3, 1918).