First name adressing = same House?

[justcarol67]

No: HPFGUIDX 84370

> Actually, JKR has stated in at least one interview (Barnes & Noble,
10/20/02) 
> that Hagrid was a Gryffindor - so sayeth the Lexicon.
> 
> Also - did Riddle call him "Rubeus" in the book?  (It's been a while
since 
> I've read that one.)  I thought he called him "Hagrid".
> 
> Sherrie


They do definitely use first names. Here's the beginning of the passage:

"Evening, Rubeus," said Riddle sharply.
The boy slammed the door shut and stood up.
"What yer doin' down here, Tom?" (CS 246, Am. edition)

I think (correct me if I'm wrong) that Tom addresses Hagrid as
"Rubeus" because Hagrid is three years younger and in a lower class
both socially and academically so for him it's a sign of his
"superiority." Guileless Hagrid calls Riddle "Tom" because he thinks
Riddle is his friend (even though Tom is falsely accusing Aragog,
Hagrid doesn't sense an ulterior motive or underlying contempt for his
origins).

So first names don't indicate being in the same house, but they do
indicate the speaker's attitude toward the other person--sort of like
the use of the familiar form of "you" in languages that make that
distinction.

Carol