Dear all,
A further update on this question. I've now located three other Barons von Stein in the Russian service during the first half of the eighteenth century, at least one of whom seems to be clearly relevant to the family I've been discussing. They are:
1. Freiherr Joseph Ignatius von Stein (or vom Stain) zu Eberstall, * 26.vii.1678, Kammerherr and lieutenant-colonel of the guard in the Bavarian service, + s.p. [1]. He came to Russia with Colonel Nikolaus Karl von Enzberg in 1709 and was a captain on the Aral Sea, ii.1710 [2].
2. Freiherr Johann Philipp Ernst von Stein (or vom Stain) zu Jettingen, first cousin once removed of Joseph, * 20.xii.1689, + unm. 1711, a captain in the Russian service in 1709 [3].
3. Freiherr Franz Theodor Otto Maximilian von Stein (or vom Stain) zu Jettingen, first cousin once removed to Johann and first cousin twice removed to Joseph, * 24.vi.1713 [4]. He had served in the Polish and Saxon services and was a colonel in the Saxon Life Cuirassier Regiment by 26.ix.1747 [5]. By 9.vii.1749, however, he and his wife, Anna Christina von Klingenberg, were living in Narva and he was bearing the rank of brigadier, apparently in the Russian service [6]. He was subsequently the Russian Governor of Kymmenegård län in Finland and the partner of a lead mine which was closed by the state, 22.iii.1761 [7]. He appears to have returned to Saxon service for a time after this, but his wife later came back to Narva and was buried in St. Johanniskirche there, 28.iii.1777 [8].
Baron Franz Theodor and his wife were resident in Narva at least from 1749 to 1755 - based on their appearances as godparents in the local churchbooks - and thus overlap with the tenure of Baron Heinrich Wilhelm (who I discussed in my previous post) as commandant of Narva in the 1740s and 1750s. It seems a stretch that there could be two unrelated Barons von Stein active in the same remote Russian provincial town in the mid-eighteenth century and I'm tempted to imagine a relationship between the two.
However, there are some problems with that theory. The von Steins (more properly vom Stains, though the two spellings are used interchangeably in the early modern period) zu Jettingen bore three wolfsangels as their arms, not the lion reported to appear on the seal matrix of the Russian Barons von Stein. In addition, the seemingly detailed and complete genealogy of the family in the _Hoheit des Teutschen Reichs-Adels_ which I've cited below gives no obvious Heinrich Wilhelm who might be the Narva commandant. Finally, the onomastic similarities are very weak, certainly much weaker than those of the von Steins zu Lausnitz who I've mentioned before.
In sum, the problem is unresolved, although I suspect that further investigation into the Barons von Stein zu Jettingen is the way forward. As always, I'd love to hear others' thoughts on the matter.
All the best,
Kelsey
[1] Die Hoheit des Teutschen Reichs-Adels (Fulda, 1740), ii. 405.
[2] Erik-Amburger-Datenbank, no. 45720.
[3] Die Hoheit des Teutschen Reichs-Adels (Fulda, 1740), ii. 404.
[4] Die Hoheit des Teutschen Reichs-Adels (Fulda, 1740), ii. 402.
[5] Ulteriorem Deductionem Causarum Restitutionis in Integram (Wetzlar, 1761), 37.
[6] St. Johannis, Narva, Kirchenbuch, 1704-1777, EAA.4380.1.2, fol. 236r.
[7] Erik-Amburger-Datenbank, no. 45693.
[8] St. Johannis, Narva, Kirchenbuch, 1704-1777, EAA.4380.1.2, fol. 428r.