*Lothaire I Holy Roman Emperor and King of Italy
born 0795 Altdorf, Bavaria
died 29 September 0855 Pruem, Rheinland, Germany
buried St. Sauveur, France

*Louis I "The Pious" Holy Roman Emperor
born August 0778 Casseneuil, France
died 20 June 0840 near Ingelheim, Rhinehessen, Hesse
buried Cathâedrale d'Aachen, Aachen, Rheinland

*Ermengarde (Irmengarde) Princess of Hesbaye
born about 0778 Hesbaye, Belgium
died 3 October 0818 Angers, France
married 0798 France

Pâepin I King of Aquitane born about 0803 France died 13 December 0835/38
*Ludwig II (Louis) "The German" King of the East Franks (Germans)
born about 0806 France died 28 August 0876 Frankfurt, Hessen-Nassau, Germany
buried Lauresheim Abbey, Germany
Rotrude Princess of the Holy Roman Empire born about 0810 France
Alpaide (Alpais) Princess of the Holy Roman Empire
born about 0808 France
*Hildegarde Princess of the Holy Roman Empire
born about 0801 France died after 0841 Laon, Belgium

*Ermengarde Countess of Tours
born about 0800 Alsace, France died 20 March 0851
buried Abbaye d'Erstein, Strasbourg, Alsace, France
married 15 October 0821 Thionville, Moselle, France

Rotrud Princess of Italy born 0833 Alsace-Lorraine, France
*Louis II "Le Jeune" Holy Roman Emperor born about 0825 Alsace-Lorraine, Austrasia
died 31 August 0875, Italy buried St. Ambroise, Italy
*Lothaire II King of Lorraine born about 0835 Alsace-Lorraine
died 7 August 0869 Plaisance, Italy
Charles King of Provence born about 0828 Alsace-Lorraine, France died 24 June 0863
*Ermengarde (Irmgard) Duchess of the Moselle (Maasgau)
born about 0832 Alsace-Lorraine
Helletrude Princess of Italy born about 0830 Alsace-Lorraine, France
Gisle Princess of Italy born about 0834 Alsace-Lorraine, France died 28 May 0861

biographical and/or anecdotal:
Lothair became co-ruler with his father in 817 and was crowned by the pope six years later.
He twice conspired with his brothers in revolts against their father. In 839 Lothair received the eastern part of the empire in addition to Italy, which he had received in 822. After the Death of Louis I, Lothair attempted to assert his power over his brothers, but he was defeated by them at Fontenoy, France, on June 25, 841. By the Treaty of Verdun (843), the title of Holy Roman emperor was guaranteed to Lothair, together with sovereignty over Italy, Burgundy, Alsace, Lorraine, and the Low Countries. After having divided his kingdom among his sons, Lothair retired to a monastery. His second son, sometimes called Lothair II, reigned from 855 to 869 over the Kingdom of Lotharingia. He is buried in Monastery of Pruem.
notes or source: