Where does “عباس” come from?

عباس (Persian) comes from Arabic عَبَّاس, from Arabic عَبَسَ — to scowl; to frown.

Ancestry of “عباس”, step by step

Step	Language	Word	Meaning
1	Arabic	عَبَّاس	one who frowns a lot; untamed lion; lion
2	Arabic	عَبَسَ	to scowl; to frown