Sofia

Variant spelling of Sophia and from various other languages' own adaptations of Ancient Greek Σοφία (Sophía, “wisdom, especially divine wisdom”). Sometimes borrowed into English as an anglicization of an accented or closely related form, as with Spanish Sofía, Welsh Soffia, and Hungarian Zsófia. As the capital of Bulgaria, via nonstandard, though now official, romanization of Bulgarian Со́фия (Sófiya), from църква „Света София“ (cǎrkva "Sveta Sofija"), from Byzantine Greek Ναός Ἁγίας Σοφίας (Naós Hagías Sophías, “Church of Holy Wisdom”), the city's prominent 6th-century Byzantine Greek church, first attested being used as the name for the city in the 14th century and reinforced under Ottoman rule as Ottoman Turkish صوفیه (Sofya). Compare the name of the Hagia Sophia.

来源：wiktionary