Doddema, Henk. "Genealogie van Roelf Geerts Doddema (Tak IID)."

• Short Title	Doddema, Henk. "Genealogie van Roelf Geerts Doddema (Tak IID)."
  Source ID	S186
  Linked to	Roelfijn DERKS Geert Roelfs DODDEMA Jakob Roelfs DODDEMA Jan Roelfs DODDEMA Roelf Geerts DODDEMA Wessel Roelfs DODDEMA Family: Roelf Geerts DODDEMA/Roelfijn DERKS (F328)