Louis I 'The Pious' Holy Roman Emperor & Ermengarde, (Irmengarde) Princess of HESBAYE 
They had a son named Lothaire I Holy Roman.
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Personal Details
Louis I 'The Pious' Holy Roman Emperor
Louis I 'The Pious' Holy Roman was born in August 0778 in Cassaneuil, Lot-et-Garonne, France. He died in Ingelheim, Rhinehesses, Hesse, Prussia.
Ermengarde, (Irmengarde) Princess of HESBAYE
Ermengarde, (Irmengarde) Princess of was born in 0778 in Hesbaye, Liege, Belgium. She died in Angers, France.
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Children
Lothaire I Holy Roman Emperor
Lothaire I Holy Roman was born in 0795 in Altdorf, Bavaria. He died in Preum, Rheinland, Prussia.