This character also occurs quite frequently:
I don't think it's EVA-m with a short tail (although that's a possibility). If it's at all similar to the way the same shape works in Latin languages, it's EVA-r with an extra loop. Curling the loop down like this (as an abbreviation symbol) was not uncommon. In fact, I've noticed while reading manuscripts that some scribes used a short tail to mean one thing and a long tail to mean another when it was attached to "r" (especially in the middle of a word):
I don't think it's EVA-m with a short tail (although that's a possibility). If it's at all similar to the way the same shape works in Latin languages, it's EVA-r with an extra loop. Curling the loop down like this (as an abbreviation symbol) was not uncommon. In fact, I've noticed while reading manuscripts that some scribes used a short tail to mean one thing and a long tail to mean another when it was attached to "r" (especially in the middle of a word):