I am still searching for a link between the Plomp's we know. Well it's possible they are relatives.
Zwijndrecht is also in South-Holland, just like Streefkerk/Zegveld.
My grandfather Gerrit Plomp, born on 27-05-1883, was a son of Arie Plomp.
Arie Plomp was first married to Lena van der Kolm.
They had 4 childeren:
Adrianus Plomp, born in 1878, who married in 1902 later to Metje Hilgeman, lived in Streefkerk.
Maartje Plomp, born ? married later to Klaas Anker, lived in Zegveld
Gerrit Plomp, born 1883,married later to Gerritje Clasina Stubbe. (my grandmother)lived in Schoonhoven
Magteld Plomp, born ?, married later to Jacobus van Leeuwen and lived in Waarder
After the death of lena van der Kolm Arie Plomp married to Marrigje langerak.(no childeren)
On the picture you see Arie Plomp, on the age of 81, with his two grandchilderen both named like him Arie.
The smallest one is my dad.
Keep in touch and please let me know what you're results are! my searching will continue....