Yes I believe This John is the correct John from Maughold , every name ever date match's , the only posibility I can find for Fredrick John to appear on Death cert is that his two sons names were recorded !!!! Ive tried to examine the Fredrick John possibility but I just found nothing , Other family records from other sources list Johns Father as William , So I achnowledge its a possibility , nothing is fact untill I can connect all the dots that my delema . 1st Who was Williams father 2nd is Fredrick a red hearing .