Where does “velhar” come from?

velhar (Old Occitan) comes from Latin vigilare, from Latin vigilo, from Latin vigil, from Proto-Indo-European weǵ- — lively, awake; strong.

Ancestry of “velhar”, step by step

Step	Language	Word	Meaning
1	Latin	vigilare	present active infinitive of vigilō;...
2	Latin	vigilo	I watch through, spend in watching, do or make...
3	Latin	vigil	awake, watching, alert; watchman, guard,...
4	Proto-Indo-European	weǵ-	lively, awake; strong

velhar — Etymology, Origin & Word History | Etymology Explorer