1. COUNT MILON I¹ DE TONNERRE was born between 867 and 978, and died between 977 and 997^[1]. He married INGELTRUDE DE MONTREUIL. ^[2]
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2

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COUNT GUY2 DE TONNERRE, d. in 992.

2. COUNT GUY² DE TONNERRE (Milon I¹), son of (1) Count Milon I¹ and Ingeltrude (de MONTREUIL), was born between 882 and 978, and died in 992^[1]. ^[2]
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3

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COUNT MILON II3 DE TONNERRE, d. about 1016; m. ERMENGARDE.

3. COUNT MILON II³ DE TONNERRE (Guy², Milon I¹), son of (2) Count Guy², was born between 896 and 993, and died between 1006 and 1026^[1]. He married ERMENGARDE.
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4

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COUNT RENAUD4 OF TONNERRE, d. in 1038; m. HERVISE.

4. COUNT RENAUD⁴ OF TONNERRE (Milon II³, Guy², Milon I¹), son of (3) Count Milon II³ and Ermengarde, was born between 928 and 1024, and died in 1038^[1]. He married HERVISE. ^[2]
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5

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ERMENGARDE5 DE TONNERRE, m. (ACC-2) COUNT WILLIAM I OF NEVERS, b. about 1030, d. in Nevers, France after 1083, son of (ACC-1) Count Renaud I and (T-17) Adele (of FRANCE), Countess of Auxerre.

5. ERMENGARDE⁵ DE TONNERRE (Renaud⁴, Milon II³, Guy², Milon I¹), daughter of (4) Count Renaud⁴ and Hervise, was born between 942 and 1039, and died between 969 and 1148. She married (ACC-2) COUNT WILLIAM I OF NEVERS, son of (ACC-1) Count Renaud I and (T-17) Adele (of FRANCE), Countess of Auxerre, who was born about 1030, and died after 1083 in Nevers. ^[2]
Child: See (ACC-2) Count William I of NEVERS