I have a problem with the Middle Name Field: The person in question was born in Bohemia, given name Jan, no middle name. He appears in almost all records I can get my hands on as Jan, no middle name, up to and including his naturalization in 1919, the only exception being his WWI registration card where he appears as John Vaclav. After that he appears always as John V. In order to avoid giving him a middle name at birth should I just leave the middle name field blank and use John Vaclav in the Preferred Name Field instead? What other strategies do you employ for such situations?