"lone", "solitary", or "only son"
According to the legend, Echtra Condla, he was not Conn's only son: he had a brother called Connla, who fell in love with a fairy woman, and went with her to Mag Mell, never to be seen again. After that, Art was alone and gained his nickname, Art Óenfer.[2]
"He defeated and killed Art in the Battle of Maigh Mucruimhe in Connacht.[6]"
https://en.wikipedia.org/wiki/Cath_Maige_Mucrama
High King of Ireland
LGE 2nd century AD
FFE AD 143–173
AFM AD 165–195
Oorzaak: gesneuveld
He had a relationship with Achtan ingen Olc.
The relationship startedSource 2
"According to legend, Art was given hospitality by Olc Acha, a local smith, the night before the battle. It had been prophesied that a great dignity would come from Olc's line, and he gave Art his daughter Achtan to sleep with. Art's son Cormac was conceived that night.[7] However, according to Keating, Achtan was Art's official mistress, to whom he paid a dowry of cattle; his wife, and the mother of his other children, was Medb Lethderg.[8]"
Child(ren):