- Category : 1930-births
- Type : MGP
- Profile : 4/6 - Opportunistic / Role Model
- Definition : Split - Large
- Incarnation Cross : RAX Service 2
Mexican movie actress of the Golden Age of Mexican cinema who appeared in the Luis Buñuel film The Criminal Life of Archibaldo de la Cruz (1955). In 1956 she starred in the film El Vampiro, a classic of the Mexican horror film genre.
Welter was a daughter of Dutch engineer and Royal Dutch Shell executive, Gerardus Jacob Welter, and his Mexican-born wife of Spanish, German and French descent Blanca Rosa. Her family moved a great deal during Ariadne's youth, living everywhere from South America and Europe, to the Middle East and Africa. As a result of this nomadic lifestyle, Welter became an accomplished polyglot with the ability to speak fluent French, German, Dutch, Spanish, English, Italian, and even a bit of haphazard Arabic and Russian.
Welter had three siblings, a sister, Blanca Rosa Welter (later known as actress Linda Christian, 1923–2011), and two brothers, Gerardus Jacob Welter (b. 1924) and Edward Albert Welter (b. 1932). She was the wife of notable Mexican film productor Gustavo Alatriste. Via Linda Christian, her sister, Welter was the sister-in-law of the actor Tyrone Power and aunt of the actors Taryn Power and Romina Power.
She died on 13 December 1998, aged 68, in Mexico City.