- Partnership with: (Unknown)
Ancestors of Thorsteinn GUDMUNDSSON
/-Gudmundur ARASON
/-Andres GUDMUNDSSON
| \-Helga THORLEIFSDOTTIR
/-Gudmundur ANDRESSON
| \-Thorbjorg OLAFSDOTTIR
Thorsteinn GUDMUNDSSON
\-Thrudur THORLEIFSDOTTIR
Descendants of Thorsteinn GUDMUNDSSON
1 Thorsteinn GUDMUNDSSON
=(Unknown)
2 Asmundur THORSTEINSSON
=Thuridur THORBERGSDOTTIR Marriage: ABT 1579, Grund, Eyjafjardar, Iceland
3 Thorsteinn ASMUNDSSON
=Margret BJARNADOTTIR Marriage: 12 OCT 1617
4 Bjarni THORSTEINSSON
=Filippia THORLAKSDOTTIR