 Johannes Harmens Werkman, son of Harmen Folkerts Werkman and Grietje Tijsses.Born 13 Jul 1812 Doniawerstal (birth declaration: 14 Jul 1812) Married 26 Oct 1850 Doniawerstal, age 38 years (married 37 years) to:  Elisabet Antoons Knoop, age by marriage approximately 34 years, daughter of Antoon Dirks Knoop and Antje Beernts de Boer.Born ± 1816, died 28 Dec 1887 Doniawerstal, age approximately 71 years (death declaration: 28 Dec 1887) Children: 1. Thoon WerkmanBorn 1 Nov 1851 Doniawerstal (birth declaration: 3 Nov 1851) 2. Beint WerkmanBorn 11 Jan 1854 Doniawerstal (birth declaration: 12 Jan 1854) 3. Grietje Johannes WerkmanBorn 23 Nov 1855 St. Nicolaasga (birth declaration: 23 Nov 185), died 30 Jan 1944 St. Nicolaasga, age 88 years, buried St. Nicolaasga 4. Antje WerkmanBorn 8 Mar 1860 Doniawerstal (birth declaration: 9 Mar 1860) | |||