Janet Lauer, While reseaching family names I ran across a post from sometime ago in Ancestry.com that they have evidently deleted from current postings. Upon searching for your name I found the Isenberg info on geforum and thought you might be the same person who posted the Ancestry.com info that I found.
It read: "My GGrandfather sometimes spelled his name John Fibbs and his fathers name was David....".
The request immediately caught my attention because it coincides with my grandfather and ggrandfather. If this by chance, is your posting(or is not) would you please let me know either on the email listed above or at email@example.com. Thank You in advance.