"Shonanonnies" are those nonnies who are inspired by Sei Shōnagon, the author and court lady of the middle Heian period in Japan who wrote, among other things, The Pillow Book. The ultimate Shonanonny is sei_shonanon, who started this early February 2011 thread.

A few other Shonanonny threads:

The Shonannonies became mostly quiet for several years, until someone started a July 2015 thread asking if they were still around, which got 18 comments. Several days later, in the same post, a nonny discussed certain Pillow Book translations.