Source of the information concerning Caspar and his marriages: www.alice-dsl.net/johannes.buschmann.htm. Source of his father’s name: Manfred Ruettgers. Source of the information about his baptismal sponsorship in 1687: FB Muenstermaifeld.
HIs name was also spelled Duencheim.
He was a baptismal sponsor in 1687 for Anna Maria, the daughter of his sister Maria Duenchenheim and Johann Oster of Gierschnach; in 1696 for Caspar, the son of Balthasar Geyrmann and Maria Ackermann of Metternich; and in 1697 for Caspar, the son of his brother Johann Duenchenheim and Margarete Daum of Wierschem.
Caspar’s first wife was Anna Maria Esch. Anna Maria’s first husband was Nikolaus Koehn. Nikolaus Koehn and his first wife Lucie Weckbecker were the parents of Barbara Koehn, Caspar’s second wife.

Source: Manfred Ruettgers and the records of St. Martin and St. Severus Catholic Church in Muenstermaifeld.
She was a baptismal sponsor in 1682 for Anna Maria, the daughter of Anton Hackmueller and Anna Stein of Schrumpftal, Metternich.

Source of her parents’ names and her birth and baptismal information: Records of St. Martin and St. Severus Catholic Church in Muenstermaifeld.
Her baptismal sponsors were Barbara [Weinandt], the wife of Johann Heinrich Koehn, and Johann Heitger of Wierschem.
She was a baptismal sponsor in 1692 for Matthias, the son of her father’s sister Anna Maria Koehn and Ludwig Ewaltz [or Ebertz] of Metternich.