Posted by Alan Hakim on July 18, 2002 at -1:41:23 from 212.137.171.54 user awhakim.
In Reply to: Re: Margaret and Peggy posted by Robert Hill on July 17, 2002 at 17:53:32:
Groups of consonants become interchangeable. P, B, V and F is one well-known group. I also like the idea that French guichet is the same as wicket.
This is usually summed up as Grimm's Law
. My teacher summarised it memorably as "Consonants change and the vowels don't matter."