From the notes in his About there seems to be some doubt as to whether he married in Netherlands or America.
The Amsterdam archief suggests to me they married before emigrating, i have found this entry but have yet to locate a copy of the record:
Pels, Evert Everts
DTB 457, p.50
Huwelijksintekeningen van de KERK.
Have i mentioned that the Paywall has been removed from the Amsterdam Archief?
Here is a link to the marriage, top right