#CúChulainn underwent perfection training in weaponry with the famous warrioress #Scáthach in #Scotland. Despite a promise of chastity to his bride #Emer, #CúChulainn impregnated #Scáthach's sister #Aoife there. From this sprang #Conla. When the latter had grown into a "little naughty boy", #CúChulainn had to kill him to preserve his honor. A prohibition forbade the greatest hero of #Ulster not only to refuse the duel, but also to be represented by another warrior.
Source: F. Le Roux/C.-J. Guyoncarc'h `Die #Druiden`