- Family of Diederik Gelderman.
- Has provided countless voices for the Dutch dubbing of movies, reaching from the early '70's to the present (2005). He is now a big man at Disney international character voices inc. providing actors for many Disney movies in different countries around Europe.
- The Smurfs and the Magic Flute (1976) was the first full length animated feature where he served as Dutch dubbing director.
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