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Male Thierry III de Montbelliard Click to view Thierry III de Montbelliard in the family tree

Thierry III de was born about 1080 in Bar-le-Duc,Meuse,France.1   Thierry III de's father was Thierry II De Montbelliard Comte de Bar-le-Duc and his mother was Ermentrude of Burgundy.  His paternal grandparents were Louis II of Montbelliard and Sophia Countess of Bar-le-Duc; his maternal grandparents were Guillaume I "The Great" of Bourgogne Count/Bourgogne and Stephanie (Etienette) of Barcelona. He had nine brothers and eight sisters, named Renaud I Count of, Renaud I, Louis de, Frederic, Count Friedrich I of, Guillaume de, Etienne, Count Reinald I of, Bishop Stephan of, Princess Gunhild of, Mathilde, Marguerite De Montbelliard, Mechtild de, Agnes De, Clementia de, Gunthilde and Princess Irmtrud of.  He was the third oldest of the eighteen children. He had a half-brother named Count Ludwig of.  He died in January 1163.1 


Thierry III de's first family with Gertrude de Habsburg

‌Thierry III de and Gertrude de were married in a religious ceremony about 1100 in <,Montbéliard,Doubs,France>.1   They had three daughters named Sophia Agnes de, Ermentrude de and Stephanie de.


Thierry III de's second family with Ermentrude of Burgundy

They had a son named Count Ludwig of.


Thierry III de's third family

He had four biological daughters named Count Dietrich V of, Princess Agnes of, Princess Irmtrud of and Princess Stephania of.

1 {Larson: Genealogical Research of Kirk Larson}
Further sources/citations:
"Héraldique européenne", "Genealogical Research of Kirk Larson", "FamilySearch® Ancestral File™ v4.19", "Pedigree Resource File - CD-Rom" @ Compact Disc #19     Pin #233315, {European Heraldry #2 Crests by Arnaud Bunel}

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