Interesting theory about the links between "Dolly" and "Peg"...... a good one to add to my list of potential names for twins!
Off-topic from the thread, but staying with twins:
Why do so many parents choose the same initial letter for twin names?
My brother and I are Keith & Kevin - caused no end of problems because Dad was Kenneth
Dad and I shared a middle name (Arthur after my grandfather); then I simply had to marry a Karen Ann! Always a discussion when bills arrived addressed to Mr K. Garrad
Years later there were another set of twins in my town - Keith and Kevin, too?!
So, when my twins were born I was adamant that no names beginning with "K" or a hard "C".
Fortunately, my daughter (one of the twins) understood and named her own twins with completely different names (loosely based on grandmother's names).
Could it be you are more likely to notice twin names more than non twins? I know of many families that all their children start with the same initial.
For instance, my sister in-laws children all start with the same letter as her own name .
The twins that I have known over the years, some have the same initial, whilst many don't. In my tree, I have a few twins, none have the same initial.
It does get confusing with the same name, my brother and father have the same name, including their middle name. They were always opening each others mail .
Kind Regards