Thanks for the note, I read through my earlier post and it does look strange how I've got the names anglicized as "John Frederick" (etc.) without distinction. Johannes is the full Latin form and was used by Germans to denote an actual first name "John", whereas Johann was the baptismal form, akin to Anna and Maria for girls ( e.g. Anna Catharina X, Maria Catharina X ), and usually discarded later. I have also read somewhere that Johann is supposed to mean "younger" ( in German jünger ) but don't see any connection between the two other than they start with the same letter ( also have yet to come across a "Johann Johannes X", so probably they are just the same name with Johann serving the baptismal function ).
For updates ( unrelated to this particular post, but earlier updates are now all over the site so might as well post here ) I've had some inquiries about the Abram or Abraham Dockstader line lately ( which much like the Jellis Dockstader line, doesn't seem to exist in primary sources ), so I'll sort that out here as best I can.
In the Doris D-R volumes, Johannes or John Dockstader ( entry 65 ) is given as the only surviving son of an Abraham Dockstader, of whom I find no trace in the primary records. From citations it appears that notes left behind by a descendant named George Washington Dockstader ( 1856-1945, s/o Abraham A. Dockstader, s/o Abraham J. Dockstader, s/o Johannes Dockstader ) gave the name of his great great grandfather as yet a third Abraham or Abram Dockstader who married a woman named Eva or Epha. Doris D-R accepts this third Abraham as the father of Johannes ( entry 65 ) in spite of some other flaws in George Washington Dockstader's notes, such as the wrong number of children given for John, and a cartoonish folk story about him being kidnapped and throwing soup at the daughter of an Indian chief, etc.
My hunch is that this "Abraham Dockstader" line is actually part of the Christian Dockstader line, and that the first Johannes ( no. 65 ) is actually the son of Christian2 Dachstaeder ( i.e. he is the "Johannes Chr. Dachstaeder" b. 25 DEC 1763 ), and his age in the 1850 census ( 91 y ) is four years out ( i.e. was actually 87 y ). The reasoning here is that every other second-generation Dockstader already has a son named "Johannes" that is accounted for ( i.e. John A, John F, John H, and John G ), and Johannes himself even has a son named "Christian Dockstader" ( who happens to be the only other Christian Dockstader on record after Christian2 ).
This would make Johannes C. Dockstader ( entry no. 40 in Doris D-R ) the same person as Johannes Dockstader ( entry no. 65 ). The first individual has only two daughters listed, and then he and his wife Catherine disappear from history; the second individual has a number of children listed, none of which contradict the first set ( both have a daughter Elizabeth born about 1790 – the daughter of the first one has an exact date given and then disappears; the daughter of the second has an approximate date given and is then continued ). The second Johannes ( no. 65 ) and his wife Catherine also have burial plots in Newville NY, unlike the first pair, who lack attested descendants, and whose ultimate whereabouts are then unknown. If this interpretation is correct then the Abraham Dockstader line actually goes Johann Georg1, Christian2, Johannes3 ( m. Catharine Ecker, d. Newville NY ).