Cú Chulainn, is an Irish warrior hero and demigod in the Ulster Cycle of Irish mythology, as well as in Scottish and Manx folklore. He is believed to be an incarnation of the Irish god Lugh, who is also his father. His mother is the mortal Deichtine, sister of king Conchobar mac Nessa.
"Setanta Slays the Hound of Culain", illustration by Stephen Reid from Eleanor Hull, The Boys' Cuchulain, 1904
"Cuchulain Desires Arms of the King", illustration by Stephen Reid in Eleanor Hull's The Boys' Cuchulain, 1904
Young Cú Chulainn depicted with sliotar and hurley in a wooden sculpture in Lucan
Young Cú Chulainn by Stephen Reid
A demigod is a part-human and part-divine offspring of a deity and a human, or a human or non-human creature that is accorded divine status after death, or someone who has attained the "divine spark". An immortal demigod often has tutelary status and a religious cult following, while a mortal demigod is one who has fallen or died, but is popular as a legendary hero in various polytheistic religions. Figuratively, it is used to describe a person whose talents or abilities are so superlative that they appear to approach being divine.
"Cuchulain Slays the Hound of Culain", illustration by Stephen Reid from Eleanor Hull's The Boys' Cuchulain, 1904
Väinämöinen, the central character in Finnish folklore and the main character in the national epic Kalevala by Elias Lönnrot, is an old and wise demigod, who possesses a potent, magical singing voice. Picture of the Väinämöinen's Play by Robert Wilhelm Ekman, 1866.
in the 1st century CE celtic peoples in the north of portugal built statues of deified local heroes which stood as guardians over hill forts
