Source: Records of St. Martin and St. Severus Catholic Church in Muenstermaifeld.
His baptismal sponsors were Heinrich Daum and Maria Katharine Huerter. Johann Heinrich’s father witnessed his wedding in 1785.
When his daughter Anna Maria was baptized in 1786, the family’s residence was given as Wierschemer Muehle.
Johann Heinrich Daum and Margarete Daum were fifth cousins once removed. Gangolf Sevenich was Johann Heinrich’s ggggg grandfather and Margarete’s gggg grandfather.

Source: Records of St. Martin and St. Severus Catholic Church in Muenstermaifeld. Source of her mother’s name, and the date of her birth: Manfred Ruettgers.
Her baptismal sponsors were [her mother’s brother] Peter Port of Gierschnach and [her mother’s stepmother] Margarete [Puelicher], the wife of [Johann] Heinrich Port of Gierschnach.