I am laying out, below, a hypothetical situation.This has not yet been proven, but it is reasonably possible...
There are a line of Frederick William DOERRs from IV, to II. Now presumably the I exists, and, in fact, I find him in my data as Frederick DOERR.Trouble is, I never see a middle name listed.That is not too, too surprising, as if its failure to be seen doesn't mean it doesn't exist.
Now I see no absolutely proven father for Frederick DOERR of Philadelphia.Yet, I *do* see this family as a shoe-in:
John George DOER 31 GER Works In Brewery GER GER Mary DOER Wife 25 GER Keeping House GER GER Annie DOER Dau 4 PA GER GER Lizie DOER Dau 2 PA GER GER Emma DOER Dau 6M PA GER GER Ernest FETTERS Other W 30 GER Works In Carpet Mill GER GER
[Note: Fetters may be Felters]
Philadelphia, Philadelphia, Pennsylvania Family History Library Film 1255187 NA Film Number T9-1187 Page Number 604A
Now the 1900 also includes a Frederick and a William! Separate names.Also a George.Now likely George would have been a John George JR.And it is conceivable that Frederick could have been a Frederick Something and William a William Something.
Frederick is listed as born: Dec 1888 William is listed as born: Dec 1885 Emma is not listed - likely marriage, possibly death.
In 1910, Frederick is not listed in the household.Likely because of marriage.And indeed, the one I seek was married 1906-1907.
This gives the earmarks of being the family of the one I seek.In fact, the middle name may never have existed, but the II, etc., may have been "awarded" by a successor along the way."I" may simply have been Frederick, and perhaps because of close family ties - the existence of the brother William may have been honored in Frederick William II.