Where does “ૐ” come from?

ૐ (Translingual) comes from Sanskrit ॐ, from Sanskrit ओ — ow, ouch.

Ancestry of “ૐ”, step by step

Step	Language	Word	Meaning
1	Sanskrit	ॐ	om; aum; the sacred syllable and mantra in...
2	Sanskrit	ओ	ow, ouch