“Jennifer” may mean “the fair one” (from Proto-Celtic “Windo-*sēbro” (cognate with Old Irish síabar “a spectre, phantom, supernatural being [usually in pejorative sense]”). A Cornish form, it is cognate with the Welsh form Gwenhwyfar and with the Old Irish Findabair. Despite the name’s similarity to the Old English words “jenefer,” “genefer,” and “jinifer,” these appear to be derived from the juniper plant used…