- Partnership with: (Unknown)
- Child: Gisli THORDARSON Birth: ABT 1100, Raudasand, , Vestur Bardastrand, Iceland
Ancestors of Thordur ULFSSON
/-Thorhallur EIDSSON
/-Skeggi THORHALLSSON
/-Ulfur SKEGGJASON
| | /-Thorkell BRANDSSON
| \-Gudrun THORKELSDOTTIR
Thordur ULFSSON
| /-Snorri THORGRIMSSON
| /-Eyjolfur SNORRASON
| | \-Hallfridur EINARSDOTTIR
\-Helga EYJOLFSDOTTIR
Descendants of Thordur ULFSSON
1 Thordur ULFSSON
=(Unknown)
2 Gisli THORDARSON
=Gudridur STEINGRIMSDOTTIR
3 Markus GISLASON
=Ingibjorg ODDSDOTTIR Marriage: ABT 1179, Raudasandi, VesturBardastron, Iceland
4 Gisli MARKUSSON
=Thordis GILLISDOTTIR