Joheved is from Jochebed (Hebrew Yocheved, the wife of Amram, mother of Aaron, Moses and Miriam).
'Joheved' is a variant spelling, maybe a Medieval spelling, or a Yiddish spelling.
In Holland, Germany and Belgium the name Joheved is pronounced like: Yo-hey-ved.
http://www.hebrewletters.com/item.cfm?itemid=44284