Adalbert of Prague (c. 956 – 997), bishop of Prague, was martyred in his efforts, to convert the Baltic Prussians
Adalbert of Magdeburg (died 981), sometimes known as the Apostle of the Slavs, first Archbishop of Magdeburg
Adalbert of Egmond, aka Adelbert of Egmond, (d first half of the 8th century), Northumbrian Anglo-Saxon missionary.
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