In 2018, 25 is the most common age for an American (U.S.) Vanessa who is registered female with the Social Security Administration. It is the 231st most common female first name for living U.S. citizens.
― Anonymous User 10/17/2018
5
The name Vanessa is also widely used in the Portuguese language, both in Brazil and in Portugal (I don't know about the Portuguese-speaking African countries, but I'd assume it's an ordinary name there, too).
Vanessa appeared on the top 1000 list in the 1950's. Its most popular year was the 1980's where it ranked 47.
― Anonymous User 9/25/2006
2
Though this name was a literary invention, it has won fame due to British actress Vanessa Redgrave (b. 1937). However, it knew great popularity in Spain through singer Manolo Escobar's adopted daughter, born in 1978.
Also Polish: https://www.behindthename.com/name/vanessa/top/poland
Also Slovene: https://www.behindthename.com/name/vanessa/top/slovenia
Also Swedish and Finnish: https://www.nordicnames.de/wiki/Vanessa