1) Vociferous preacher 
skilled orator with powerful voice
• Any declamatory and vociferous preacher or orator.
`Sons of thunder`, name given by Christ to the two disciples James and John, the sons of Zebedee (Mark 3:17). ...
Bo`a·ner'ges [ Greek ... , from Hebrew bnē hargem sons of thunder. -- an appellation given by Christ to two of his disciples (James and John). See Mark iii. 17.] Any declamatory and vociferous preacher or orator. 
a surname given by Jesus to James and John. Mark 3:17. · a vociferous preacher or orator.