Given that Handley Page looked for names beginning with H and chose Hastings for their transport a/c at about the same time, could it be that the Air Ministry Permanent Aircraft Naming Committee (AMPANC) required the names of towns and cities for their Transport a/c at the time? So the Blackburn Beverley. Obviously Avro weren't too bothered about the alliteration bit, but still came up with York. Nor Shorts with the Belfast, or the HS Andover. What about the Argosy I hear you ask? Did it really qualify though?
Hat, Coat. No really don't bother, I'll see myself out...