Where does “Palermo” come from?

Palermo, the capital of Sicily, derives from Italian Palermo, which comes from Arabic Paler'o or Palerm, possibly meaning "full harbor."

Ancestry of “Palermo”, step by step

Step	Language	Word	Meaning
1	Italian	Palermo	—
2	Sicilian	Palermu	—
3	Arabic	بَلَرْم	—
4	Latin	Panormus	—
5	Ancient Greek	Πάνορμος	—
6	Ancient Greek	πᾰν-	every; all, every
7	Ancient Greek	πᾶς	all, every, each; whole
8	Proto-Hellenic	*pánts	—