Adalbert, St., bishop of Prague, who, driven from Bohemia, essayed to preach the gospel in heathen Prussia, where the priests fell upon him, and “struck him with a death-stroke on the head,” April 27, 997, on the anniversary of which day a festival is held in his honour.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Adalbert * Ada`lia