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Birth:          1074 Bavaria
Death:          13 Dec 1126 Ravensburg, Donau, Wuerttemberg, Germany
Burial:         Weingarten

Notes
became a lay brother of his foundation at Weingarten
https://en.wikipedia.org/wiki/Henry_IX,_Duke_of_Bavaria
Henry IX (1075 – 13 December 1126), called the Black, a member of the House of 
Welf, was Duke of Bavaria from 1120 to 1126.
Life and reign[edit]

Henry was the second son of Duke Welf I of Bavaria (d. 1101) from his marriage with 
Judith, daughter of Count Baldwin IV of Flanders. As a young man, he administered 
the family's Este property south of the Alps.

Through his marriage to Wulfhilde, daughter of Duke Magnus of Saxony, about 1095, 
he acquired part of the Billung estates around Lüneburg (the nucleus of the later Welf 
duchy of Brunswick-Lüneburg). He aspired to succeed his father-in-law as Saxon duke 
when Magnus died without male heirs in 1106, but was denied as the new king Henry 
V enfeoffed his follower Count Lothair of Supplinburg.

Duke Henry nevertheless upheld close relations with the ruling Salian dynasty. In 
1116, he joined Emperor Henry V's second Italian campaign to seize the estates of 
late Margravine Matilda of Tuscany. He succeeded his elder brother Welf II as 
Bavarian duke, when the latter died childless in 1120. Henry was also instrumental in 
bringing about the 1122 Concordat of Worms, ending the long-lasting Investiture 
Controversy between Pope and Emperor.

Upon the emperor's death, Duke Henry played a vital role in the royal election of 
1125: first supporting his son-in-law, the Hohenstaufen duke Frederick II of Swabia, 
he switched his allegiance to his old rival Duke Lothair of Saxony —probably after 
Lothair promised that Gertrude, his only daughter and heir, would marry Henry's son 
Henry the Proud. The marriage was concluded in May 1127. The estrangement 
between the Welf and Hohenstaufen dynasties ("Guelphs and Ghibellines") lasted 
until the 13th century.

After Lothair won the tumultuous election, he imposed an Imperial ban on Frederick II, 
however, the king's forces were not able to conquer the Hohenstaufen territories in 
Swabia. In 1126 Henry abdicated as Bavarian duke in favour of his second son Henry 
the Proud and retired to the family foundation of Weingarten Abbey in Upper Swabia, 
possibly to not be obliged to participate in the prosecution of his son-in-law.

Henry died shortly thereafter and was buried in Weingarten. His wife Wulfhilde 
outlived him by only 16 days. Henry's epithet "the Black" has not been recorded 
before the 13th century. Both Emperor Frederick Barbarossa and his bitter rival Henry 
the Lion were his grandsons.

Issue[edit]

Henry and Wulfhilde had the following children:
Judith, married Frederick II, Duke of Swabia[1]
Conrad (died 17 March 1126)
Henry X the Proud, married Gertrude of Süpplingenburg, succeeded his father as Duke 
of Bavaria
Welf VI (died 1191)
Sophia, married Duke Berthold III of Zähringen and secondly Margrave Leopold of 
Styria
Wulfhild, married Rudolf I, Count of Bregenz
Mathilde, married Diepold IV, Margrave of Vohburg and Count Gebhard III of Sulzbach
Adalbert, Abbot of Corvey

Parents
____ Welf (Guelph) IV (1037 - 6 Nov 1101)
OF FLANDERS Judith (Fausta) (1033 - 5 Mar 1094)

Siblings
____ Henry (Heinrich) (Welf) IX "the Black" (1074 - 13 Dec 1126)

Marriage To OF SAXONY Ulfhild (Wolfhildis) (1072 - 29 Dec 1126)
    m.  

Notes

Parents
____ Magnus (ABT 1045 - 23 Aug 1106)
OF HUNGARY Sophia (ABT 1041 - )

Children by OF SAXONY Ulfhild (Wolfhildis) 1072 - 29 Dec 1126
OF BAVARIA Judith (19 May 1100 - 27 Aug 1130)
____ Henry X ("the Proud") (ABT 1108 - 20 Oct 1139)

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