Ah, I love the idea of exploring the origins of the [mostly anglicized] Dutch names that are found throughout the Upper South -- and starting to help people discriminate between the Dutch who migrated from Pennsylvania and the Germans who migrated from Pennsylvania and were also called "Dutch".
As Carrie says, this would be a great candidate for a One Place Study, or something similar.
The new study would not fall within the scope of the New Netherland Settlers project, although some of the people who went to Kentucky might also be categorized as New Netherland Descendants, and this is definitely a related topic to NNS.
From sources like http://freepages.genealogy.rootsweb.ancestry.com/~lowdutch/Kentucky/firstldsettlersky.html and http://www.jstor.org/stable/pdf/23369502.pdf I get the impression that descendants of New Netherland settlers migrated to Kentucky as a group (or in multiple groups) around 1780. (That's outside both the time frame and geographic scope of NNS.)
To cover this topic in WikiTree, you'll want to have at least one category and at least one Free-space page. Before you create these, do you have a good name for this community and topic? I searched on "Low Dutch Colony of Kentucky" because that's a term I saw while skimming the Brouwer-Brewer_Family_Mysteries page, but you may know of a better term. Once you've chosen a name for the category, add that category to a profile for one of the people involved in the Kentucky settlement by entering a category name like [[Category: Low Dutch Colony]] at the top of the profile. That will generate a red link to an edit page where you can create the category. Do that by adding at least one appropriate parent category (maybe [[Category: Kentucky]] for starters?) at the top of the page and adding some text to tell about the settlement and tell what the category is for. For now, I suggest that you link to the New Netherland Settlers categories by including text like See also [[:Category: New Netherland Settlers]] (the colon makes a category name work like a link), but I don't believe that there is an NNS-related category (at least not yet) that's suitable for becoming a parent to this new category.