FREDERICK UNKNOWN

FREDERICK's father was FREDERICH VON BÜREN and his mother was HILDEGARDE DE BAR-MOUSSON.  His paternal grandfather was FREDERICH *VON SCHWABEN; his maternal grandfather was OTTO II BERENGER *VON SCHWABEN.  He was an only child.  He died on April 6th, 1105.¹ 

They had a son named FREDERICK II.