In Irish mythology, men with great destinies like Lugaid Riab nDerg (and by some tellings Cú Chulainn) are conceived of three fathers.

Lugaid’s mother seduced triplets Bres, Nár and Lothar to hedge her bets in case 1 or 2 died in battle. He was born with a horizontal red stripe across his hips and another across his chest showing he was ⅓ from each.