Wicca

[Rita Winston]

No: HPFGUIDX 1174

While the religion named Wicca is also called Witchcraft, it has 
NOTHING to do with the 'witchcraft' in HP. If only JKR had called the 
females wizardesses instead of witches, she could have skipped the 
word 'witchcraft' altogether. I cannot emphasis enough how wildly 
different it is for a person to do magic by praying to the gods and 
building a strong mental concentration on a set of symbols, than for 
a person to do magic because they have a rare inborn magic power 
and a wand with a realio-trulio dragon heartstring! 

Therefore, what Wiccans believe about names is basically irrelevant 
to HP. What mattters is what JKR believes about names.

However, for the record, while individual Wiccans are welcome to 
believe in numerology and so on, the most common idea about names in 
Wicca is that your birth name doesn't particularly matter at all, 
except for legal documents, and your self-chosen name matters only as 
much as you make it matter. Some people have been given new names by 
the gods, which is a whole 'nother story.