Alpaide (Alpais) [dau of Louis the Pious] d'Aquitaine, Princess of the Holy Roman Empire (794 - 855)

http://fmg.ac/Projects/MedLands/CAROLINGIANS.htm#_Toc144009955

Emperor Louis I had [two] illegitimate children by Mistress (1):

10. [ALPAIS ([793/94]-23 Jul 852 or after, bur [Reims]). Flodoard refers to "Ludowicus Alpheidi filie sue uxori Begonis comitis"[217]. The Annales Hildesheimenses name "filiam imperatoris…Elpheid" as the wife of "Bicgo de amici regis" when recording the death of her husband[218]. Settipani discusses the debate about the paternity of Alpais, preferring the theory that Emperor Charles I was her father[219]. If Emperor Louis was her father, it is unlikely that she was born before [793/94], given his known birth date in 778. It would therefore be chronologically tight for her to have had [three] children by her husband before his death in 816. However, no indication has been found in primary sources of the age of these children when their father died. The question of Alpais's paternity is obviously not beyond doubt, but it is felt preferable to show her as the possible daughter of Emperor Louis in view of the clear statement in Flodoard. No indication has been found of the name of Alpais's mother. If Alpais was the daughter of Emperor Louis, it is likely that she was not her husband's only wife in view of Bego's estimated birth date. After her husband died, she became abbess of Saint-Pierre-le-Bas at Reims in [817]. She was still there 29 May 852. m ([806]) [as his second wife,] BEGO, son of [GERARD [I] Comte de Paris & his wife Rotrud] ([755/60]-28 Oct 816). He governed the county of Toulouse as "marchio" for Septimania in 806. Comte de Paris in [815], succeeding comte Stephanus.]

11. ARNOUL ([794]-after [Mar/Apr] 841). The Chronicon Moissacense names "quartum…filium [Ludovici]…ex concubina…Arnulfum" recording that his father gave him the county of Sens[220]. Comte de Sens 817. He was a supporter of his half-brother Emperor Lothaire in [Mar/Apr] 841[221].

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Alpaide (Alpais) 's father was Louis I "The Pious" Emperor Of The HOLY ROMAN EMPIRE and her mother was Ermengarde (Irmengarde) Princess Of HESBAYE.

Her paternal grandparents were Charlemagne Emperor Of The HOLY ROMAN EMPIRE and Hildegard Empress Of The HOLY ROMAN EMPIRE;

her maternal grandparents are Ingeramne, Duke Of HESBAYE and Mrs-Ingeramme, Duchess Of HESBAYE.

She had three brothers and two sisters, named Lothaire I Emperor Of The, Pbepin I King Of, Ludwig II (Louis) "The German" King Of The, Hildegarde Princess Of The and Rotrude Princess Of The.

She had two half-brothers and a half-sister, named Charles II "The Bald" Emperor Of The, Charles II The Bald and Gisela Princess Of The.

http://familytrees.genopro.com/454373/Roelofs/HOLYROMANEMPIRE-Alpai...
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Alpais Carolingian was born 793 to Louis the Pious (778-840) and Theudelinde de Sens (769-794) and died 855 at the age of 61 years of unspecified causes.

http://familypedia.wikia.com/wiki/Alpais_(793-855)
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Husband: Beggen (Bego) , Count of Paris {1,2}
Birth: 760 {3}
Marriage: aft 806 Alpaide (Alpais) , Princess of the Holy Roman Empire {4}
Death: 28 Oct 816 {5}

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Father: Gerard I of Paris {6}
Mother: Rotrude {6}
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Wife: Alpaide (Alpais) , Princess of the Holy Roman Empire {1,7}
Birth: abt 794 France {8,9}
Marriage: aft 806 Beggen (Bego) , Count of Paris {4}
Death: abt 29 May 852 {8}

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Father: Louis I "the Pious" of Aquitaine , Holy Roman Emporer {10,11,1,12,13}
Mother: Irmingard of Hesbaye {10,11,1,14}
--------------------------------------------------------------------------------Children
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F Engeltron of Paris {15}
Birth: 790 {16}
Death: 853 {17}

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M Liziard III of Paris {18}
Birth: 809 {17}
Marriage: 828 Grimeut {17}
Death: 3 Jan 858 {17}

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F Susanna of Paris {19}
Birth: betw 805 and 810 {17}
Marriage: abt 834 Ulrich II , Count of Argengau and Linzgau {20}
Marriage: abt 834 Wulfhard {20}

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F Landree of Paris {6}
Birth: 816 {17}

http://www.shocking.com/~gregbard/genealogy/fam00717.php
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533. Louis I "le Debonaire" , King of France, Holy Roman Emperor (Charlemagne...) was born in Aug 778 in Casseneuil, Loire-et-Garonne, France. He died on 20 Jun 840 in Ingelheim, Rhinehessen, Germany. He was buried in Metz, Germany.

He had the following children:

590 M i Arnould was born in 790/794 in France. He died after 817.

Louis married (2) Ermengarde de Hesbaye daughter of Ingeramne , Count of Hasbania in 797 in France. Ermengarde was born about 778 in Hesbaye, Liege, Belgium. She died on 3 Oct 818 in Angers.

They had the following children:

+ 591 M ii Lothaire , King of Italy and Germany
+ 592 M iii Pepin I , Duke of Aquitaine King
+ 593 M iv Louis "the German" (Ludovicus Germanicus) , King of Germany
594 F v Rotrude de Hesbaye was born about 808 in France.
+ 595 F vi Alpais de Hesbaye
596 F vii Hildegarde de Hesbaye was born about 812 in France. She died after 841.
Hildegarde married Count of Thierry. Count was born about 810.
597 F viii Adelaide de Hesbaye was born about 814 in France.
Adelaide married Conrad , Comte d'Auxerre. Conrad was born about 812.
+ 598 F ix Gisle de Hesbaye

Louis married (3) Judith von Audech daughter of Gelph (Welf) , Count von Audech und Bayern and Edith von Sachsen in Feb 818/819. Judith was born about 792 in Bavaria. She died on 19 Apr 843 in Tours, Indre-et-Loire, France.

They had the following children:

599 F x Gisela of France was born about 840. She died in 876.
+ 600 M xi Charles I "the Bald" , King of France, Holy Roman Emperor

http://www.bradleyfoundation.org/Maite/marcus/tobg44.htm#6101

595. Alpais de Hesbaye (Louis I "le Debonaire" , Charlemagne ,....) was born about 810 in France.
Alpais married Beggen (Bego) , Comte de Paris. Beggen was born about 795 in Paris, Seine, France. He died about 860.
They had the following children:

664 M i Eberhardus , Comte de Logenhae was born in 816/818 in Paris, Seine, France.
665 F ii Adelaide , Queen of the Franks was born about 850 in Paris, Seine, France.

http://www.bradleyfoundation.org/Maite/marcus/tobg44.htm#6101