Amaltrud of Vienne, Charlemagne's 8th partner & 3rd concubine

His third known concubine was Amaltrud of Vienne. [http://en.wikipedia.org/wiki/Charlemagne

By her he had:

8.1 Alpaida (b.794) [http://en.wikipedia.org/wiki/Charlemagne
NOTE: It seems worth mentioning that this is the Wikipedia version Jan 2011, and Cawley's Medlands don't mention an Alpaida or an Amaltrude. A possible reason is that the Wikipedia concubine, Amaltrud is the NN concubine of Cawley, whose daughter - Ruodhaid/Rotaide (784) actually looks like the same person as the concubine Madelgard's daughter Rothildis, who Cawley gives as born in the same year (784), and which Wikipedia doesn't duplicate.

Please see Charlemagne Project for Source Details

From Wikipaedia:

Marriages and heirs of Charlemagne

Charlemagne had twenty children over the course of his life with eight of his ten known wives or concubines. Nonetheless, he only had four legitimate grandsons, the four sons of his third son, Louis. In addition, he had a grandson (Bernard of Italy, the only son of his third son, Pippin of Italy), who was born illegitimate but included in the line of inheritance. So, despite twenty children, the claimants to his inheritance were few.

1. His first relationship was with Himiltrude. The nature of this relationship is variously described as concubinage, a legal marriage, or a Friedelehe.[35] (Charlemagne put her aside when he married Desiderata.) The union with Himiltrude produced two children: - Amaudru, a daughter[36] - Pippin the Hunchback (ca. 769–811)

2. After her, his first wife was Desiderata, daughter of Desiderius, king of the Lombards; married in 770, annulled in 771.

3. His second wife was Hildegard (757 or 758–783), married 771, died 783. By her he had nine children: - Charles the Younger (ca. 772–4 December 811), Duke of Maine, and crowned King of the Franks on 25 December 800 - Carloman, renamed Pippin (April 777–8 July 810), King of Italy - Adalhaid (774), who was born whilst her parents were on campaign in Italy. She was sent back to Francia, but died before reaching Lyons - Rotrude (or Hruodrud) (775–6 June 810) - Louis (778–20 June 840), twin of Lothair, King of Aquitaine since 781, crowned Holy Roman Emperor in 813, senior Emperor from 814 - Lothair (778–6 February 779/780), twin of Louis, he died in infancy[37] - Bertha (779-826) - Gisela (781-808) - Hildegarde (782-783)

4. His third wife was Fastrada, married 784, died 794. By her he had: - Theodrada (b.784), abbess of Argenteuil - Hiltrude (b.787)

5. His fourth wife was Luitgard, married 794, died childless.

Concubinages and illegitimate children:
6. His first known concubine was Gersuinda. By her he had: - Adaltrude (b.774)

7. His second known concubine was Madelgard. By her he had: - Ruodhaid (775–810), abbess of Faremoutiers

8.His third known concubine was Amaltrud of Vienne. By her he had: - Alpaida (b.794)

9. His fourth known concubine was Regina. By her he had: - Drogo (801–855), Bishop of Metz from 823 and abbot of Luxeuil Abbey - Hugh (802–844), archchancellor of the Empire

10. His fifth known concubine was Ethelind. By her he had: - Richbod (805–844), Abbott of Saint-Riquier - Theodoric (b. 807)

http://en.wikipedia.org/wiki/Charlemagne