I may have a link to your family tree.
Egbert Ronda (b. about 1840) from the Netherlands, married a Minnie (Jakomina?) Achterhof, born within a few years of 1840.
According to Mary Achterhof, this "Minnie" may be Jakomina, a daughter of Hendrik Jakobs Achterhof and Greitje Hendriks Weits?
Do you have record of any of this?