The Eyrbyggja Saga on Kiallak the Old
Chapter 1 - Herein Is Told How Ketil Flatneb Fares To West-Over-Sea. > Chapter 7 - Of The Kin Of Kiallak.
relationship: Kiallak the Old married Astrid, daughter of Rolf the Hersir and sister of Steinolf the Low
"Kiallak had to wife Astrid, daughter of Rolf the Hersir, and sister of Steinolf the Low"
relationship: Kiallak and Astrid had three children: Thorgrim the Priest, Gerd, and Helga
"They had three children: Thorgrim the Priest was a son of theirs, and their daughter was Gerd"
attestation: The descendants of Kiallak formed a powerful kindred called the Kiallekings
"From the children of Kiallak is sprung a great kindred, which is called the Kiallekings."