Because of the many records that include the family members, there are over 150 Glucksteins listed in the Knowles Collection- Jews of the British Isles, as well as many other related families. However, finding the family in the records of the Netherlands has not always been as fruitful a search. Now, its possible to find some of those Dutch families with the help of http://www.familysearch.org/.
In the Historical Records Collections section of FamilySearch.org, the following collection can be found.
A search of the database found the records of five children of Lehman Gluckstein and his wife Helena Horn. They are Joseph, Alexander, Salomon, Harry and Bertha. Although the images of the original documents are not shown, the information, such as for Joseph below, gives the FHL Film Number where the documents can be found.
While the record is not complete for the entire country, in fact this couple had at least one more of their eleven children born in the Netherlands, it is a great way to jump family back to the Netherlands, and to fill in those missing family members. Since www.familysearch is a free database, what can be lost for trying?