Various .ttf, .fon, and .pcf font files in ~/.fonts not being recognized by fc-cache
I have created a ~/.fonts directory to store my user fonts in, and installation is apparently copying over font files into it and reloading with 'fc-cache -fv'. For testing that the font is really installed, I run 'fc-list | grep [whatever the font name is]'
However, this has only worked for my two Terminus fonts (TerminusBold.ttf, Terminus.ttf) and all 7 of the ProFont pcf files.
My other fonts that are not being recognized are GohuFont, MonteCarlo, Tamsyn, and ProggySquare.
Why would fc-cache not recognize these fonts when I do an 'fc-cache -fv' ? Some are .pcf files, some are .ttf, and Proggy is .fon. I would at least expect the first two filetypes to be recognized, but only Terminus and ProFont are?