Dutch singer known as Father Abraham who wrote over 1,600 songs.
He worked in an Amsterdam chocolate factory before starting his musical career.
He might be best known for composing the popular The Smurf Song, which was used for The Smurfs animated series in the 1980s and sold over 25 million copies.
He was in a longtime relationship with wife Annie Kartner.
He produced Carlos Marin 's first album in 1976.