Correct spelling for the English word "Jennefer" is [d͡ʒˈɛnɛfə], [dʒˈɛnɛfə], [dʒ_ˈɛ_n_ɛ_f_ə] (IPA phonetic alphabet).
The name "Jennifer" is of Cornish origin and derives from the Welsh name "Gwenhwyfar", which means "white phantom" or "fair and yielding". Over time, the name "Gwenhwyfar" evolved into "Gweniver" and eventually became "Jennifer". It gained popularity through the character of Guinevere, the wife of King Arthur, in Arthurian legend. The name "Jennifer" became more commonly used in the English-speaking world during the 20th century.