Save Type Settlement Usage English (American) Pronounced Pron. /ˈdʒoʊ.li.ɛt/(American English) /dʒoʊ.li.ˈɛt/(American English) [key·simplify] Meaning & History Transferred use of the French surname Joliet. The city in Illinois was named for Louis Joliet, one of the first Europeans to map the Upper Mississippi area.