Hi Ben and other Zonnevelden, Sonnevelden, Sollvelden etc.
My name is Jan Lamboo, living in Aruba, about as far from Holland as you are.
My mother is a Zonneveld from Voorschoten/Wassenaar.
I've put the tree at www.lamboo.org
Currently working with some distant cousins to close in the oldest Sonneveldt we know. It's Floris Paets van Sonneveldt who bought "the house of Sonneveldt" in 1416. This is located between Wassenaar and Leiden. The remains are apparently still there.
A logical migration following the cost line for both farmers and bulbgrowers was to go up from Westland/The Hague to Wassenaar, to Lisse and then into Heemskerk, Castricum.
So somewhere our lines should meet. Would appreciate contact on this and a look from your side on where we are currently.