"Dag [Dagr], from whom come the Döglings [Dǫglingar];"
"Döglings
Dag married Thóra Heroes-mother (Thóra drengjamóður) who bore him nine sons, but only four are named: Óli, Ám (Ámr), Jöfur, and Arngrím (Arngrímr).
Óli was father of Dag, father of Óleif (Óleifr), father of Hring, father of Helgi, father of Sigurd Hart (Sigurðr Hjǫrtr), father of Ragnhild (Ragnhildr) the mother of Harald Fairhair.
"Arngrím married Eyfura who bore him Angantýr the Berserk (Angantýr berserkr). Angantýr's story is most fully treated in the Hervarar saga. It also appears in part in book five of Saxo Grammaticus' Gesta Danorum and an account only the deaths of Angantýr and his eleven brothers appears in Arrow-Odd's saga."
He is married to Thóra drengjamóður.
They got married
Child(ren):
Ook Dagr, Dagling, Dögling
https://en.wikipedia.org/wiki/Dagling#Dag_of_the_nine_sons
"This makes this Dag roughly contemporary with the Dag of Ynglinga saga, Hervarar saga and Orvar-Odd's saga, as Arngrim's sons Angantyr and his brother Hjörvard would have been the cousins of the Swedish king Yngvi, whose daughter Hjörvard wanted to marry. This proposal would lead to both Angantyr and his brothers being killed in battle against the Swedish hero Hjalmar and his Norwegian friend Orvar-Odd.[citation needed] The "Hversu Noregr Byggðist" tells that Dag's father, Halfdan the Old, received a promise from the gods that there would be no woman and no man who was not of great repute among his descendants for three hundred years.[3]"