Where does “フィラデルフィア” come from?

フィラデルフィア (Japanese) comes from Portuguese Filadélfia, from English Philadelphia, from Latin Philadelphia, from Ancient Greek Φιλαδέλφεια, from Ancient Greek Φιλάδελφος, from Ancient Greek φιλέω, from Ancient Greek ἀτέλεια, from Ancient Greek ἀ- — together, one.

Ancestry of “フィラデルフィア”, step by step

フィラデルフィア traces back through 3 separate lines of ancestry.

via Portuguese Filadélfia

Step	Language	Word	Meaning
1	Portuguese	Filadélfia	—
2	English	Philadelphia	OS grid ref NZ3352
3	Latin	Philadelphia	—
4	Ancient Greek	Φιλαδέλφεια	Philadelphia, the name of a number of Ancient cities
5	Ancient Greek	Φιλάδελφος	brother-loving
6	Ancient Greek	φιλέω	I love, like, regard highly; I treat kindly,...
7	Ancient Greek	ἀτέλεια	exemption from public burdens, immunity
8	Ancient Greek	ἀ-	The alpha privativum, used to make words that...
9	Proto-Hellenic	hə-	same; together
10	Proto-Indo-European	sm̥-	one; with, together
11	Proto-Indo-European	sem-	together, one

via Italian Filadelfia

Step	Language	Word	Meaning
1	Italian	Filadelfia	—

via Spanish Filadelfia

Step	Language	Word	Meaning
1	Spanish	Filadelfia	—

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