Manjaro folks use a beautiful icon theme called Menda-Circle in their distribution. The sources are public of course and is distributed under Creative Commons ShareAlike v4.0.
Source - menda-icon-theme - Github link
I had packaged the icon theme for my use sometime back and now I am making it available for anyone that wants to use it. The package name is called menda-icon-theme and will appear as Menda Circle
These can be downloaded using the links below.
Here are some screenshots -