Hi Dick,
there is someone in the Netherlands that made pedigrees for families with names Falkenburg, Valkenburg, Valkenburgh etc. and I have contributed information. You can find my pedigree in http://www.valkenburgh.nl/ped-groningen.html . Louis Falkenburg went in the early 1900 to Indonesia and mariied a half Dutch/Javanese woman, my grandmother Marie de Leeuw. Hence, the pedigree shows a Dutch/Jewish branch ( the siblings of my grand-father) and an Indo-European branch (off-springs from my grand-father Louis).
I, myself, married a Dutch woman and I am happily maried for 41 years. I was born in Batavia (former Dutch East Indies) and came to the Netherlands in October 1950. I hold a master degree in Chemical Engineering and have been an entrepreneur for the last 25 years. You can find some information about me in the news items of www.orient-technologies.com.
Regards,
Rudy