There used to be a website that listed the Ionic 4 icons; but it seems to have been replaced by the list of Ionic 5 icons. My guess is these go with Ionic 5, correct. As i pick one from the list and it doesn’t show anything in my Ionic 4 app.
You can find the old Icon Documentation here: https://ionicons.com/v4/
Awesome. Thanks. I guess i just hadn’t scrolled down far enough to see them listed in the footer.