Blastus
The name Blastus means “that buds or brings forth”.
Easton's Bible Dictionary 1897
Chamberlain to king Herod Agrippa I. (Acts 12:20). Such persons generally had great influence with their masters.
Smith's Bible Dictionary 1863
International Standard Bible Encyclopedia 1915
blas'-tus (Blastos, "shoot"): The chamberlain of Herod Agrippa I, whose services as an intermediary between them and the king were gained by the people of Tyre and Sidon. These cities were dependent on Palestine for corn and other provisions, and when Herod, on the occasion of some commercial dispute, forbade the export of foodstuffs to Tyre and Sidon, they were at his mercy and were compelled to ask for peace. "Having made Blastus the king's chamberlain their friend," probably by means of a bribe, the Phoenician embassy was given an opportunity of setting their case before Herod (Ac 12:20 ff).
S. F. Hunter