Well, if I'm doing this correctly... when I spin up the 2.14.0.3 docker/latex image and poke around, in:
/usr/share/fontconfig/conf.avail/
I see in: 40-nonlatin.conf:
<!--
Sans-serif faces
-->
<alias>
<family>Arshia</family>
<default><family>sans-serif</family></default>
</alias>
<alias>
<family>Elham</family>
<default><family>sans-serif</family></default>
</alias>