Where does “Philadelphia” come from?

Philadelphia (Latin) comes from Ancient Greek Φιλαδέλφεια, from Ancient Greek Φιλάδελφος, from Ancient Greek φιλέω, from Ancient Greek ἀτέλεια, from Ancient Greek ἀ-, from Proto-Hellenic hə-, from Proto-Indo-European sm̥-, from Proto-Indo-European sem- — together, one.

Ancestry of “Philadelphia”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Φιλαδέλφεια	Philadelphia, the name of a number of Ancient cities
2	Ancient Greek	Φιλάδελφος	brother-loving
3	Ancient Greek	φιλέω	I love, like, regard highly; I treat kindly,...
4	Ancient Greek	ἀτέλεια	exemption from public burdens, immunity
5	Ancient Greek	ἀ-	The alpha privativum, used to make words that...
6	Proto-Hellenic	hə-	same; together
7	Proto-Indo-European	sm̥-	one; with, together
8	Proto-Indo-European	sem-	together, one

Words derived from “Philadelphia”

Every word from Proto-Indo-European sem- →Every word from Ancient Greek ἀ- →Every word from Ancient Greek ἀτέλεια →