Children of Willemtje DOEVEN and Jan JONKMAN are:
|1.|| i.||Hendrik Jans JONKMAN was born 2 OCT 1800 in Dingsterveen, and died 3 FEB 1881 in Kerekenbosch (Zuidwolde) 4. He married Hillechien Geugjes MASTENBROEK, daughter of Geuchien Bartelds MASTENBROEK and Geertje KONSTAPEL.
She was born 14 JUL 1800 in Zuidwolde, and died 13 JAN 1863 in Wemmenhove (Zuidwolde) 5.
| || ii.||Annechien Jans JONKMAN was born 12 NOV 1809 in Nijeveen. She married Jan Gerrits HAM, son of Gerrit Reinds HAM and Hillechien ROELOFS.
He was born 1807 in Dwingeloo.