In "Death of a Salesman", what was the last name of Bernard and Charley, neighbours to the Lomans?I'm supposed to write a newspaper article about...

In the play "Death of A Salesman," Charlie is a neighbor and friend to Willy.  Benard is Charlie's son.  Their last names are never revealed.  Charlie is described as "a large man, slow of speech, laconic, immovable” – engages in teasing banter with Willy, who feels insulted when Charley good-heartedly offers Willy a job."  Charlie is called Uncle Charlie by Biff and Hap, however he is not related to the family, just a friend who helps the Lomans financially.