Where does “Sha'aban” come from?

Sha'aban (English) comes from Arabic شَعْبَان, from Arabic شَعَبَ — to scatter, to disperse.

Ancestry of “Sha'aban”, step by step

Step	Language	Word	Meaning
1	Arabic	شَعْبَان	—
2	Arabic	شَعَبَ	to scatter, to disperse