In my 50-year period, most of the texts I found were miscellanies dedicated to poetry or essays; more specifically, miscellanies functioned like a medium dedicated to the collection of various poems or essays-- some of the collections had a focus, but most did not. However, the ones I did find to have a subject or focus were usually centered around etiquette, morals, or critical discourse. None of the texts I found were specifically explicated as a "commonplace book."
I found the book "On the Sources of Patriarchal Rage: The Commonplace Books of William Byrd and Thomas Jefferson and the Gendering of Power in the Eighteenth Century" by Kenneth A. Lockridge. I simply searched "commonplace books*" in WorldCat and it was my first result; I did not specify my search at any point because I immediately found something that worked for my subject.