Please put all given names in the First Name field and the patronymic in the Middle Name field.
Also with a Dutch marriage women keep their own last name, so do NOT put the last name of the husband in the Last Name field of the woman. you can put it in the AKA and/or Display Name field.
Many of the Dutch have a short call name (like Theodorus may be called Dick or Cornelis may be called Kees), please do not put this call name in the First Name or Middle Name field, but put it in the AKA field and please do NOT use () or "" around it.
The Dutch have a prefix name field that does not exists in other languages where you will values like "de, van, het, op, van der, van het" and a few more. In Geni they should go in the Last Name and Birth Surname field in front of the last name and they should be in lowercase.
Sorting in sources will be done on last name + prefix (Be careful, the Belgium's do not have this prefix field and they will write them with a starting uppercase as part of the last name)
Be careful with patronymics in search, Geni compares name fields from end to start over the shortest length. There are different ways to spell a patronymic and different ways it will be shortened. Example: Janszoon can be written if full Janszoon, but also as Janszn, Jansz, Jans or even just Jan (mostly Jansz or Janszn will be used)
So to make sure Search can find a profile it can be useful to put the variants in the AKA field
Also the Dutch language has an extra letter ij mostly written as an i followed by a j, (and for uppercase written as IJ and if the user uses a Dutch keyboard you could even find it as a single character but that is very very rare) but it should be sorted between x and z. so you will see it written as y as well, so often one of the variants will have to go into the AKA field to be sure the profile can be found using either variant.
