Johannes Harmens WERKMAN
- Birth: 13 Jul 1812, Doniawerstal, Friesland, Nederland
- Death: 13 Mar 1875, Doniawerstal, Friesland, Nederland
- Partnership with: Elisabeth Antoons KNOOP
Marriage: 26 Oct 1850, Doniawerstal, Friesland, Nederland
Descendants of Johannes Harmens WERKMAN
1 Johannes Harmens WERKMAN =Elisabeth Antoons KNOOP Marriage: 26 Oct 1850, Doniawerstal, Friesland, Nederland