- Father: Grjotgard HERLAUGSSON
- Birth: ABT 838, Hlade, Trondheim, Sor-Trondelag, Norway
- Birth: ABT 838
- Death: ABT 917, Strongfjorden, , Norway
- Partnership with: (Unknown)
Ancestors of Haakon GRJOTGARDSSON
/-Harald TRONDSSON
/-Herlaug HARALDSSON
| \-Signy SIGARDSDATTER
/-Grjotgard HERLAUGSSON
Haakon GRJOTGARDSSON
Descendants of Haakon GRJOTGARDSSON
1 Haakon GRJOTGARDSSON
=(Unknown)
2 Asa HAKONARDOTTIR
=(Unknown)
3 Ketilbjorn KETILSSON
=Helga THORDARDOTTIR Marriage: ABT 894, Skalholt, Arness, Iceland
4 Thorkatla KETILBJORNSDOTTI
=Eilifur ONUNDSSON Marriage: ABT 939, Nordur Mula, Iceland
4 Thorgerdur KETILBJORNSDOTTIR
=Asgeir ULFSSON
4 Teitur KETILBJORNSSON
=Olof BODVARSDOTTIR
2 Unnur HAKONSDATTER
= HROLF
3 Kolgrimur HROLFSSON
=Gunnvor HRODGEIRSDOTTIR
4 Bergthora KOLGRIMSDOTTIR
=Refur THORSTEINSSON