These are the now-unmaintained KDE Plasma Oxygen fonts, that are still widely used as webfonts.
Currently using as a font in my GTK desktop.
Add to INDEX
^ you can drop my name here
^ as you are using the kde-plasma CATEGORY (to fetch), the pkg is called plasma5-oxygen-fonts-5.4.3, i.e. it gets the PKGNAMEPREFIX plasma5-
As it is no longer part of plasma5, I would suggest you add
This came straight from that svn repo
Friendly reminder that I'm not a committer.
I'll commit it wit minor changes (the pkg-descr, while taken directly from the upstream repo, doesn't match current terminology)