He is married to Adelheid van Lauffen.
They got married.
Child(ren):
https://en.wikipedia.org/wiki/Count_palatine#Counts_Palatine_of_Saxony
"Frederick V (d. 18 October 1120 or 1121), grandson of Frederick I, Count of Sommerschenburg, Count Palatine of Saxony in 1111"
==>
"Frederick I (d. 1042), a younger son of Burchard I, was Count of Goseck and in the Hassegau and was Count Palatine of Saxony in 1040"
Dedo (d. 1056) en Frederick II (d. 1088) waren zoons van Frederik I (d 1042) en dus mogelijk vader van Frederik V (d. 1020)
Dat strookt niet met Adalbert Seveke, zoon van Lothar V
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https://de.wikipedia.org/wiki/Pfalzgraf#Pfalzgraf_von_Sachsen
"Friedrich V. vom Sommerschenburg († 18. Oktober 1120/21), Enkel Friedrichs I., Pfalzgraf in Sachsen 1097, Pfalzgraf von Sachsen 1111,
Friedrich VI. († 19. Mai 1162), 1121 Pfalzgraf, 1123–1124 Pfalzgraf von Sommerschenburg, Sohn Friedrichs V."
Frederik V was een oom van Frederik I.
Frederik I van Sommerschenburg | |||||||||||||||||||||||||||||||||||
Adelheid van Lauffen |
https://nl.wikipedia.org/wiki/Frederik_I_van_Sommerschenburg
https://en.wikipedia.org/wiki/Count_palatine#Counts_Palatine_of_Saxony