Landgrave Hermann of Thuringia I & Countess Sofie of Sommerschenburg 
Hermann and Sofie were married in 1182.1 They had a son and four daughters, named der Heilge, Jutte, Hedwig, Irmgard and Agnes.
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Personal Details
Landgrave Hermann of Thuringia I
Hermann was born in 1143 in Sommerschenburg, Sachsen, Prussia.1 Hermann is no longer alive.
Countess Sofie of Sommerschenburg
Sofie was born in 1147 in Sommerschenburg, Sachsen, Prussia.1 She died at the age of 48 in 1195.1
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Children
Princess Jutte of Thuringia
Jutte was born in 1183 in Thuringia.1 She died at the age of 52 on August 6th, 1235.1
Princess Irmgard of Thuringia
Irmgard was born in 1186 in Wartburg Bei Eisenach, Sachsen-Weimar-Eisenach, Thuringia.2
Landgrave Ludwig (der Heilge) of Thuringia IV
Ludwig, known as der Heilge, was born on October 28th, 1200 in Wartburg Bei Eisenach, Sachsen-Weimar-Eisenach, Thuringia.2
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=bevangenealogy&id=I33168&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=bevangenealogy&id=I33219
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=bevangenealogy&id=I33219