Braslav, Duke of Lower Pannonia

Braslav ( 882–896) was an East Frankish Slavic nobleman with the title of dux (duke), the governor of Lower Pannonia between 884 and 896, serving Arnulf of Carinthia. He participated in the Frankish–Moravian War (882–84), and the Frankish invasion of Moravia (891–92). He was last mentioned when he was entrusted Pannonia by Arnulf in order to secure the Frankish frontier against the Hungarians (896), who subsequently overran all of Pannonia and continued into Italy.

Background
In 882–84, a bloody war was fought between Arnulf of Carinthia and Svatopluk I of Moravia, during which Pannonia and the Danube suffered the most. Svatopluk is said to have "slaughtered" and "destroyed much with fire and sword". The two agreed on peace in 884.

Life
A Slavic prince and ardent Frankish loyalist, according to the Frankish Annals, Braslav was the "Duke of Lower Pannonia" (Pannonia inferior cum duce Braslao ad officium rediit). He ruled a province from the Drava to the Sava (modern-day Slavonia). He took part in the 884 Frankish–Moravian peace treaty reached at Tulln.

Sometime during 891, according to the Annals of Fulda, Arnulf sent an embassy led by margrave Arbo to Moravia in order to renew the peace. A letter written by the margrave soon announced that the legates were returning from Svatopluk and the Moravians who had agreed "to give themselves in friendship". Svatopluk, however, broke his pledges, thus Arnulf decided to invade Moravia in 891. First Arnulf met with Braslav, the Slavic dux on the river Sava, next raised an army of Franconians, Bavarians and Alamanni, and also recruited Hungarians to join his campaign (for the latter recruitment, Ottonian authors blamed Arnulf for unleashing the Hungarians on Europe). Braslav participated in the 892 campaign.

After Svatopluk's death in 894, the Hungarians ravaged Pannonia, becoming enemies of Arnulf, threatening Frankish Pannonia. The critical situation came after the Hungarians had occupied the Pannonian basin between the Tisza and Danube. Thus, in 895 or 896, Arnulf entrusted Mosapurc (modern Zalavár, Hungary) and Pannonia to Braslav, thereby strengthening the defense of his southeastern frontier. Arnulf and Braslav could not stop the Hungarians, and Pannonia was subsequently overran by the Hungarians. Braslav was last mentioned in a source dating to 898, at which time the Hungarians with a great army had breached into Italy for the first time, having crossed the Slavic lands.

Legacy
Bratislava, the capital of Slovakia, has been theorized as having been named after Braslav (Brezalauspurc, 907).

In modern Croatian historiography, he is called a Croat prince.