The Palatinate is relatively small in size but sufficiently large in population to have been able to cast off so many of her children who ultimately landed upon the shores of the New World, and over a considerable span of time.In that you are @penn.com, I'm assuming that you are located in PA and likely descend from the Pennsylvania Dutch, as am I from an unrelated line on my maternal side.I'm aware that a number of Palatine Schucks settled in PA during the 18th century, but I don't know the municipality(s) of their origin.To my knowledge (and I'm sure it's incomplete), the only Obermoscheler Schucks - my clan - to arrive in America did so during the early years of the latter half of the 19th century.
The original forebear of the Schucks of Obermoschel, in the north-central reaches of the Palatinate, first arrived there in the early 17th century, migrating from the town of Käshofen in the west-central part of the territory.Conversely, the eldest son of one of the last of the Schucks who currently reside in Obermoschel lives in Zweibrücken in the west-central zone.What I'm getting at is the fact that Palatine Schucks have been migrating not only to this hemisphere but have also been moving from one Palatine location to another over the centuries as well, and elsewhere in Germany too (one Obermoscheler Schuck served in Munich as a bodyguard to one of the late 19th century kings of Bavaria, when the Palatinate belonged to that kingdom).Consequently, the name pops up quite frequently throughout the Palatinate.
I'm in possession of a book entitled "Untertanenlisten, Pfalz-Zweibrücken, 1776."Not knowing how conversant you are in German, the title translates, essentially, Lists of the Subjects [of the Dutchy] of the Palatinate-Zweibrücken in 1776.In other words, it is a listing of all of the male inhabitants - and also widows - of the lands under the domain of the new Duke, Christian IV, of the Palatinate-Zweibrücken on the occasion of his accession to the throne in the year of 1776, who were obligated to swear fealty to him at that time.The dukedom didn't include all of the lands of the Palatinate, obviously, but it did cover a considerable swath of the territory nonetheless, inclusive of Obermoschel.And amongst the duke's subjects are listed a whole host of Schucks who resided in a good many of the communities all throughout his realm.Not so those by the name of Heydrich/Heidereich/Hetrick.Indeed, the name Heyderich appears on just two pages of listings (pgs. 151-52) out of a total of 299 pages; its bearers were commoners of the town of Erzweiler, as were a number of their neighbours named Schuck, specifically, Peter Schuck, Nickel Heyderich, Caspar Schuck, and Nickel Schuck - listed under "Sons with Living Parents" were Adam Heyderich, 26 years, currently travelling; Nickel Heyderich, 18 years; and Peter Schuck, 24 years.Their oaths of fealty were registered on the 26th of November 1776.
Now, you mention that your Schuch women wed some fellows named Heydrich, and you wonder about a variation in the spelling of the former.Note that my surname was spelt Schuck, Schuch, and Schug in Obermoscheler church records at one time or another over a span of several centuries. These were the years before spelling standardization, and as the pastor of the day may easily have come from another region entirely, and the sound of the local dialect may thus have been relatively foreign to his ears, he undoubtedly spelled it as he phonetically pleased (hence, I expect, the multiple spellings of Heydrich as well).The possible version you describe is unknown to me.In America the name has often been anglicized as Shook.Schuck is possibly an older pronunciation that preceded the linguistic sound shift which produced the Modern High German form Schuh (which, of course, is the cognate of the English shoe), or perhaps it's simply the dialectic form particular to the region - I'm not a master of onomastics - although, I'm aware of the fact that the family of the actor John Schuck originally hailed from Hanover, and postings in GenForum indicate other points of origin in Germany as well.
I hope the above is helpful to your search.Erzweiler may indeed be a locality that you will want to zero in on.