The name Wendi means Friend Or Blessed Ring and is of English origin. Wendi is a name that's been used primarily by parents who are considering baby names for girls.

Made popular by J M Barrie in the novel Peter Pan, from a small girl who referred to him as her "Friendy Wendy" or friend.

Also found earlier in the US and the UK, possibly as a diminutive for Gwendolen or other names beginning with Gwen.