Theodo I, duke of Bavaria

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Theodo I, Herzog von Bayern

Also Known As: "Theo; Theodon;"
Birthplace: (Present Bavaria), Herzogtum Bayern (Present Germany)
Death: Died in (Present Bavaria), Herzogtum Bayern (Present Germany)
Immediate Family:

Son of Garibald II, duke of the Bavarians and Geila di Friuli
Husband of Gleisnod di Friuli and Wife of Theodo I (Not Fara)
Father of Theodo II, duke of Bavaria; Pilitrud von Bayern; Uta von Bayern; Lantpert, duke of Bavaria and Saint Almaberge de Neustria
Brother of Agilolf von Bayern

Occupation: Duke of the Bavarias, 10th King of the Bavarians c640-c680
Managed by: Private User
Last Updated:

About Theodo I, duke of Bavaria

Theodo I, Duke of Bavaria (c630-c670), but sometimes called Theodo IV. HIs ancestry is speculative. (Stewart Baldwin, soc.genealogy.medieval, May 18, 2012).

Supposed son of Garibald II, Duke of Bavaria, and Appa or Gaila

m. Gleisnot


  1. . Landbert
  2. . Uta
  3. . ? , m. Grimoald

The Foundation for Medieval Genealogy has this to say about Theodo IV (from the Medlands page on Bavaria):

THEODO, son of --- . THEODO IV Duke of Bavaria.

The Annales Ducum Bavariæ name (in order) "Theodo…Theodo [et] Theodebertum" as Dukes of Bavaria, this being the second Theodo[54].

The mid-13th century Series Ducum Bavariæ lists, in order, the dukes from 514 as Theodo "dux primus", Theodo II, "Garibaldus rex", Tassilo [I] dux, Theodo III "quem sanctus Ruodbertus baptizavit", Theodebertus, Theodo IV "qui cum filiis sanctum Corbiniacum locavit Frisinge"…[55], which appears to ignore this Duke Theodo IV.

(One son only - Theodo V / II is not listed as a son, nor is Uta listed as a daughter):


The Annales Ducum Bavariæ name "Lantpertus" as son of the second "Theodo", recording that he killed "sanctum Emmaramum"[56].


[54] Annales Ducum Bavariæ 652, MGH SS XVII, p. 365.

[55] Series Ducum Bavariæ, MGH SS XXIV, p. 73.

[56] Annales Ducum Bavariæ 652, MGH SS XVII, p. 365.


The English Wikipedia page describes Theodo IV / I based on his son, Theodo V / II:

Theodo (about 625 – 11 December c. 716) also known as Theodo V and Theodo II, was the Duke of Bavaria from 670 or, more probably, 680 to his death.

It is with Theodo that the well-sourced history of Bavaria begins. He strengthened Bavaria internally and externally and, according to Arbeo of Freising, he was a prince of great power whose fame extended beyond his borders.

His father was Theodo IV, Duke of Bavaria and his mother was probably Fara of Bavaria (b: 600), daughter of one of the Kings of the Lombards and (her mother) Daughter of Gisulf of Friuli (b: 577).

Theodo established his capital at Ratisbon (modern Regensburg). He married Folchaid, of the aristocracy of Alemannia, to build diplomatic ties there. He intervened in Lombard affairs by harbouring the refugees Ansprand and Liutprand, whom he assisted militarily on his return to claim the Iron Crown. Liutprand later married his daughter Guntrude. Theodo also defended his duchy ably from the Avars (with some failure in the east).

Theodo is the patron to the four great missionaries of Bavaria: Saint Rupert, Saint Erhard, Saint Emmeram, and probably Saint Corbinian. He was the first to draw up plans for the Bavarian church, aiming both at a deeper cultivation of the countryside as well as greater independence from the Frankish Kingdom by a closer association with the Pope. He was the first Bavarian duke to travel to Rome, where he conferred with Pope Gregory II. The diocesan seats were placed in the few urban centres, which served as the Duke's seats: Regensburg, Salzburg, Freising and Passau.

Two of his children were involved with the death of Saint Emmeram. Theodo's daughter Uta had become pregnant by her lover. Fearing her father's wrath, she confided to Emmeram and the saint promised to bear the blame, as he was about to travel to Rome. Soon after his departure, Uta's predicament became known and in keeping with the agreement she named Emmeram as the father. Her brother Lantpert went after Emmeram and greeted him as "bishop and brother-in-law," ie, episcope et gener noster! Then he had Emmeram cut and torn into pieces. Theodo had the remains of the saint moved to Regensburg. Nothing more is known of Lantpert and Uta.


Some historians have distinguished between a Duke Theodo I, ruling around 680, and a Duke Theodo II, reigning in the early eight century. Theodo I is attributed with the events involving Saint Emmeram, Uta and Lantpert, while Theodo II is associated with Saints Corbinian and Rupert, the ecclesiastical organisation and the division of the Duchy. However, no contemporary source indicates a distinction between different Dukes of that name.

To complicate matters even further, Bavarian tradition has referred to Theodo I and Theodo II as Theodo IV and Theodo V respectively to differentiate them from legendary Agilolfing ancestors Theodo I to III, all who would have reigned before 550.

Marriage and issue

He married Regintrude of Austrasia, daughter of Dagobert I and Regintrude. They had the following:

1. Daughter of Theodo, married Godefroy, Duke of Alamannia

He also married Folchiade of Salzeburg. They had the following:

1. Theodbert

2. Theobald

3. Tassilo

4. Grimoald

Theodo was eventually succeeded by his four other sons, among which he divided his duchy sometime before 715.

As early as 702, Theodbert had been ruling from Salzburg and from 711 or 712, Theobald was co-reigning. It is impossible to see if this division was territorial (as with the Merovingians) or purely a co-regency (as with the later princes of Benevento and Capua). If so, Theodbert's capital was probably Salzburg and the Vita Corbiniani informs that Grimoald had his seat there. References to Theobald and the Thuringii implies perhaps a capital at Regensburg and this leaves Tassilo at Passau. All of this is educated conjecture.

Duke of Bavaria 680–716

Preceded by unknown

Succeeded by Theodbert, Theobald, Tassilo II, and Grimoald


Die Genealogie der Franken und Frankreichs by Karl-Heinz Schreiber:

Vita of St Robert

Foundation for Medieval Genealogy on Theodo V


From "Die Genealogie der Franken und Frankreichs" by Karl-Heinz Schreiber:

Theodo I. Herzog von Bayern (630-680)

   -   680 

Sohn des Herzogs Garibald II. von Bayern und der Appa oder Gaila

oo Gleisnot


1. Landbert

2. Uta

3. ? oo Grimoald



Jarnut Jörg: Agilolfingerstudien. Anton Hiersemann Stuttgart 1986 Seite 8,117


Theodosius I. ( Före 630, † 680) Från dynastin i Agilolfinger var ungefär vid den tidpunkt 640-680 Hertig av Bayern. Ibland är det också kallas Theodosius IV , till de mer legendariska Dukes Theodosius I-III. innan alla 570 , räkning .

Theodosius I regerade som hertig av Bayern, utan att deras specifika klassificeringen i släktträd av Agilolfinger skulle verkligen säkras , i synnerhet som källmaterial för Bayern i 7. Century är så svag att tillförlitliga uppgifter kan vara allvarliga. Informationen i denna artikel grundar sig därför i hög grad på indirekta slutsatser .

Med sin fru Gleisnod de Friuli Theodosius hade två barn: en son och efterträdare som hertig Office, LantpertOch dottern Uta. Vid hans hov i Regensburg att låta ambulerande biskopen Emmeram ned.

Med angelägenheter Frankerriket under denna tid han verkar ha haft lite att göra , eftersom det är från denna sida nämns inte praktiskt. Hans omedelbara efterträdare var hans son Land Stekt / Lantpert, Mördaren St Emeran . Efter Lantpert följde tydligen en kort regeringstid Theodosius II.


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Theodo I, duke of Bavaria's Timeline

(Present Bavaria), Herzogtum Bayern (Present Germany)
Age 23
(Present Bavaria), Herzogtum Bayern (Present Germany)
Age 23
Age 34
Neustria, Normandie, Austrasia, France
Age 47
Age 68
Duke of Bavaria
Age 68
(Present Bavaria), Herzogtum Bayern (Present Germany)
Age 68