Is There A Young Mundungus Fletcher?

[erisedstraeh2002]

No: HPFGUIDX 41709

In recent posts, there has been discussion of who Mundungus Fletcher 
is. I'm wondering whether this might be another case of a same-named 
father and son (like Tom Riddle Sr./Jr. and Barty Crouch Sr./Jr.), 
where the Mundungus Fletcher Dumbledore references at the end of GoF 
as being part of the "old crowd" is really Mundungus Jr.  In CoS, 
Arthur Weasley states that "old" Mundungus Fletcher tried to put a 
hex on him.  Could JKR's use of the word "old" mean that there is 
a "young" Mundungus?  It also seems strange to me that Dumbledore 
would be summoning someone to help him fight Voldemort who, from the 
few references we've had, appears fairly batty (he tries to put a hex 
on Arthur Weasley for no apparent reason and makes a crazy World Cup 
claim in GoF).  If these references are to Mundungus Sr., this would 
make more sense (to me, anyway!).

(I'm a new listie, so my apologies if this has been discussed before!)
 
Phyllis (I'm named after my Mom and my brother's named after my Dad, 
so perhaps this explains my "Jr." preoccupation...)