Matching family tree profiles for Rotrude
Please see Charlemagne Project for Source Details
Note: A further debate needs to occur about whether this Rotrude was Abbess of Faremoutiers, or whether that was a half sister by Madelgard, a concubine of Charlemagne. Charles Cawley's Medlands & one of the Wikipedia entries below appears to suggest this, but not indisputably. Sharon Doubell
King Charles I & his second wife [Hildegard] had nine children: [one of whic was] 3. HROTHRUDIS [Rotrud] (-6 Jun 810). Betrothed (781, contract broken 787) to Emperor KONSTANTINOS VI, son of Emperor LEON IV & his wife Eirene (14 Jan 771-Prinkipo Island [15 Aug 797/before 806], bur Constantinople, Monastery of St Euphrosyne). Mistress: () of RORICO [I], son of GAUZLIN & his wife Adeltrudis --- (-after 1 Mar 839 , bur Abbaye de Saint-Maur de Glanfeuil, Anjou). He lived at the court of Charlemagne. Comte de Rennes 819. Comte du Maine . [http://fmg.ac/Projects/MedLands/CAROLINGIANS.htm#_Toc240955192
[King Charles had Rothildis by] Mistress (3): [MADELGARD] ---. Settipani names Madelgardis as the mistress of King Charles, and mother of Rothildis abbess of Faremoutiers. However, he cites no primary source on which this is based, apart from a reference to an early 9th century list of nuns at Faremoutiers which includes the name. No reference has been found to her in any of the sources so far consulted. http://fmg.ac/Projects/MedLands/CAROLINGIANS.htm#_Toc240955192] Mistress (2):Einhard refers to "Ruodhaidem" as the daughter of King Charles and an unnamed concubine. http://fmg.ac/Projects/MedLands/CAROLINGIANS.htm#_Toc240955192]
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 - Bertha (779-826) - Gisela (781-808) - Hildegarde (782-783)
7. His second known concubine was Madelgard. By her he had: - Ruodhaid (775–810), abbess of Faremoutiers http://en.wikipedia.org/wiki/Charlemagne
Abbess of Faremoutiers Abbey (French: Notre-Dame de Faremoutiers) was founded circa 620 by Burgundofara (Saint Fara). It formed an important link between the Merovingian Frankish Empire and the southern Anglo-Saxon kingdoms of Kent and East Anglia.
The abbey was a dual monastery, that is it had separate accommodations for monks and nuns. It was established following the strict Rule of Saint Columbanus. Originally named Evoriacum, it was renamed in Burgundofara's honour.
The modern village of Faremoutiers grew up around the abbey which was endowed with lands by Saint Fara.
From the Wikipedia page of Rotrude:
Rotrude (or sometimes referred to as Hruodrud) (775 - June 6, 810) was the second daughter of Charlemagne from his marriage to Hildegard.
Few clear records remain of Princess Rotrude's early life. She was educated in the Palace School by Alcuin, who affectionately calls her Columba in his letters to her.
When she was six, her father betrothed her to Constantine VI of Byzantium, whose mother Irene was ruling as regent. The Greeks called her Erythro and sent a scholar monk called Elisaeus to educate her in Greek language and manners.
However, the alliance fell apart by 786 when she was eleven and Constantine's mother, Irene, broke off the engagement in 788.
She then became the mistress of Rorgo of Rennes and had one son with him, Louis, Abbot of Saint-Denis (800–9 January 867). She never married.
Rotrude eventually became a nun, joining her aunt Gisela, abbess of Chelles. The two women authored a letter to Alcuin of York, who was at Tours at the time, requesting that he write a commentary explaining the Gospel of John. As a result, Alcuin eventually produced his seven-book Commentaria in Johannem Evangelistam, a more accessible companion to the gospel than St. Augustine's massive and challenging Tractates on St. John. Commentators have dated the letter to the spring of 800, four years before Alcuin's death and ten before Rotrude's. 
In contemporary views of history, most scholars discriminate between the two phases of Rotrude's life. Political histories of Charlemagne her father discuss her as a princess who was potentially a pawn and a woman of questionable morals , while religious histories discuss her as the second nun in the letter from Chelles.
1.^ Gaskoin, C. J. B. Alcuin: His Life and His Work. New York: Russell & Russell, 1966
2.^ Runciman, Steven. "The Empress Irene the Athenian." Medieval Women. Ed. Derek Baker. Oxford: Ecclesiastical History Society, 1978.
3.^ "Epistola Christi Familarum Gislae atque Rechtrudae ad Albinum Magistrum." Patrologia Latina 100:738D-740C.
4.^ Ed. Dümmler, Monumenta Germanicae Historica: Epistolae aevi Carolini II, pp 323-325
Daughter of Charlemagne's Concubine, Madelgard; Abbess of Faremoutiers
By Madelgard Charlemagne had:
5.1 Ruodhaid (775–810), Abbess of Faremoutiers [http://en.wikipedia.org/wiki/Charlemagne] ROTHILDIS [Rouhaut] (-24 Mar 852). Abbess at Faremoutiers from before Oct 840. Her parentage is proved by the necrology of the abbey of Saint-Germain-des-Prés which records the death "XI Kal Apr" of "Rothildis abbatisse et monache filia regis magni Karoli". The necrology of the abbey of Saint-Denis records the death "XI Kal Mar" of "Rotildis abbatissa". and: CHROTHAIS [Rotaïde] (-after 800, maybe after 814). "Ruodhaidem" is named daughter of King Charles and an unnamed concubine by Einhard. Theodulf's poem Ad Carolum Rege names (in order) "Berta…Chrodtrudh…Gisla…Rothaidh…Hiltrudh, Tetdrada" as daughters of the king. [http://fmg.ac/Projects/MedLands/CAROLINGIANS.htm#_Toc240955192]
Note: Wikipedia seems possibly to conflate what Charles Cawley sees as 2 mistresses and their respective daughters Ruodhaid / Chrothias / Rotaide / Ruodhaidem / Rothildis / Rouhaut, in a manner that seems worth considering. Although Cawley designates an unknown Mistress 2 before Madelgard - who he sees as Mistress 3, he lists the daughters of both mistresses as being born in 784. Despite this, he specifies that Madelgard’s daughter was Abess of Faremoutiers, - although Wikipedia sees her as being born in 775. The Wikipedia sources for this date weren’t apparent, but Cawley’s use of Theodulf's poem Ad Carolum Rege naming the daughters (supposedly in order) provides another form of data: "Berta…Chrodtrudh…Gisla…Rothaidh…Hiltrudh, Tetdrada"  As both Wikipedia & Cawley agree that Gisela was born 781, Hiltrude in 787 & Theodrata 785 (so much for correct order), this places one Rothaide - between 781 & 787, so I am deferring to Cawley on the date, but going with Wikipedia in conflating the women whose children he has born in the same year, with names that are sufficiently similar as to be synonymous.
Cawley: NN Mistress 2's daughter: 784. Ruodhaidem CHROTHAIS [Rotaïde].
Cawley: Madelgard - Mistress 3's daughter: 784. ROTHILDIS [Rouhaut]. Abbess.
Wikipedia: Madelgard's daughter:775.Ruodhaid. Abbess.
Mistress (3): [MADELGARD] ---. Settipani names Madelgardis as the mistress of King Charles, and mother of Rothildis abbess of Faremoutiers. However, he cites no primary source on which this is based, apart from a reference to an early 9th century list of nuns at Faremoutiers which includes the name. No reference has been found to her in any of the sources so far consulted. http://fmg.ac/Projects/MedLands/CAROLINGIANS.htm#_Toc240955192]
Mistress (2):Einhard refers to "Ruodhaidem" as the daughter of King Charles and an unnamed concubine. http://fmg.ac/Projects/MedLands/CAROLINGIANS.htm#_Toc240955192]
Alt bith date: 775; Alt death date from merges: 852
Aachen, , Rheinland-Pfalz, Germany
Poitiers, Vienne, France
June 6, 810
Comté du Maine, Neustria (Present France), Frankish Empire