I'm finally getting around to cleaning up one site. Pared down the number of fonts to two. It was long overdue.
Using Tools>Global Replace was a big help.
Removed all but the two desired Google fonts from Tools>Options>Fonts. Simple.
Found some fonts Global Replace didn't change in a few editboxes all on one page - no problem to change them manually.
In search of the unwanted font I checked each style in Style Manager; nothing there.
When I close and re-open the site in WWB17, I get a notice Open Sans Light is missing and do I want to install it. Of course - NO.
I've manually checked

The question is - IS there a better, faster more sure way to find a particular font site-wide?
I could let it go, it doesn't really hurt the site - I don't see it on any page. But it's just not tidy, and besides, it's - still - lurking....