Ethel & Wim,
I have a far amount of information on all of these families as they are all ancestors or married into my families (or all of the above!)
I can find no ship information for the Evert Duenk who came in 1847. There was another Evert Duenk who came in 1849 who was 9 years older than your Evert, Ethel. Are you from the John William Duenk family whose descendants changed the name to Dunk and lived in Indiana??
Wim - The info I have on Hendrik Jan Duenk b. Jan 1803 is that he married Janna Geertruid Snoejenbos. Their children
Alida b. 19 July 1837 who married Garret Jan Lemkuil
Hendrik b. 8 Aug 1839 married Dirk Wm. te Ronde
John (Arent John) b.4 Mar 1841 married Altje van de Schuur
Harmina Johanne (Minnie) b. 5 Aug 1843 married
John te Ronde
Johannah Geertruida b. 8 Nov 1845 married Garret John
This may help - or make things more confusing!