┌── Jan Willems Kaatman (Approximately 1760 - Saturday 14 March 1818 Siddeburen, Slochteren, Groningen, Nederland)

Willem Jans Kaatman(Thursday 30 August 1804 Ackerenden, Siddeburen, Slochteren, Groningen, Nederland - Friday 02 July 1869
 Siddeburen, Slochteren, Groningen, Nederland)

   │           ┌── Jan Jannes (Date unknown - Date unknown)

   │           │     └── Aaltijn Harms (Date unknown - Date unknown)

   │     ┌── Jan Jannes (1747 Siddeburen, Slochteren, Groningen, Nederland - Date unknown)

   └── Hilke Jans van Sloten (Siddeburen, Slochteren, Groningen, Nederland;1773 - Wednesday 23 September 1807)

         │     ┌── Jan Tonnis Steenhuis (Approximately 1710 Midwolda, Groningen, Nederland - Date unknown)

         └── Amke Jans (Siddeburen, Slochteren, Groningen, Nederland;Approximately 1747 - Monday 16 July 1827)

               │     ┌── Harmen Harms Mos(About 1680 Farmsum, Delfzijl, Groningen, Nederland - 1730 Siddeburen, Slochteren, Groningen,
               │     │    Nederland) =>

               └── Hilke Harms Mos (1710 Siddeburen, Slochteren, Groningen, Nederland - Date unknown)

                     └── Trijnie Luppes (Siddeburen, Slochteren, Groningen, Nederland;1687 - After 1743)