Re Weasley Christian names

[sylviablundell2001]

No: HPFGUIDX 76987

Wasn't Percival one of the knights of the Round Table, and Mr. 
Weasley's name, of course, is Arthur. (Though actually I think the 
suggestion that Percy is short for Perseus much more thought- 
provoking). You would think, if they were going to use an old family 
name, they would have given it to the eldest son, not one half way 
down the list. Interesting that Percy who is  always regarded as the 
odd one out in the family should be the only one with a magical name.