“What do you call a rich elf?”/“Welfy.”

An elf riddle is:
 
Q: What do you call a rich elf?
A: Welfy (wealthy).
 
The riddle has been cited in print since at least 2003.
 
       
14 December 2003, Green Bay (WI) Press-Gazette, “Sites of the Season” by Erin Chan, pg. D-1, col.1:
Q. How do you describe a rich elf?
A. Welfy.
   
Google Groups: uk.people.silversurfers
cracker joke
Rabbit
12/15/04
(...)
Q: How do you describe a rich elf?
A: Welfy.
         
The Escapist
Christmas Cracker Jokes.
Eagle Est1986
16   POSTED: 10 December 2008 3:52 am
(...)
How do you describe a rich elf?
Welfy
 
Rory’s Jokes
MONDAY, MAY 4, 2009
What do you call a rich elf?
Welfy!
POSTED BY RORY AT 10:37 AM
 
Twitter
CЯAIG THOMAS‏
@CraigThomas_
what do you call a rich elf? welfy. brilliant.
10:32 AM - 13 Nov 2009
 
Twitter
David Crank‏
@davidcrank
How do you describe a rich elf?
Welfy
10:45 PM - 10 Dec 2009
     
Google Books
Dick and Dom’s Christmas Jokes, Nuts and Stuffing!
By Dominic Wood and Richard McCourt
London, UK: Macmillan Children’s Books
2015
Pg. ?:
How do you describe a rich elf?
Welfy
 
Reddit—Dad Jokes
What do you call a rich elf? (self.dadjokes)
submitted November 5, 2016 by CalumMoo
Welfy
 
Twitter
Tracy Davidson‏
@tracydavidson27
Day 7 #ChristmasJokes countdown:
What do you call a rich elf?
Welfy!
2:07 AM - 7 Dec 2017