Euron's mongrel sons
Euron's mongrel sons is the term used by the ironborn to refer to King Euron Greyjoy's baseborn offspring born of salt wives taken from across the world. One of them is a boy of ten with woolly hair and skin the color of mud.
A Feast for Crows
My father wishes words with you.—One of Euron's mongrel sons to Victarion Greyjoy
Victarion: You have sons.
Euron: Baseborn mongrels, born of whores and weepers.Euron: So are the contents of my chamber pot. None is fit to sit the Seastone Chair, much less the Iron Throne. No, to make an heir that's worthy of him, I need a different woman. When the kraken weds the dragon, brother, let all the world beware.
Victarion: They are of your body.
—Euron and Victarion Greyjoy