Hi Russell, I see you get little traction on this question, and I think I see why.
1. The records of Hirschland are kept at the Archives d'Alsace in Strasbourg. As far as I know, they are not available at Ancestry.com, but you can get at them from
https://archives67.alsace.eu/archive/recherche/etatcivil/lineaire?RECH_commune_Libel=HIRSCHLAND|&RECH_commune_Md5=f51152006766db2585e2e55394581711|&type=etatcivil. If you want to look at neighboring villages, consult a map and type the name into the "Commune" field. (Unfortunately, there do not seem to be indexes of the content.)
2. In order to not try to find a needle in the haystack the size of Alsace and Pennsylvania, it would be useful to narrow down the search space for his marriage. You cited an internet archive for an arrival on board ''Edinburgh'', arriving in Philadelphia on 16 September 1751. The look-up date is fairly recent, 2026, but the record location is not clear. Is this voyage of the ''Edinburgh'' listed in the landing records of Philadelphia? Who was traveling with him, and how old were they? This might help to narrow down the continent, at least.
3. The three children in his profile were all born in Pennsylvania, when Conrad was at least 45 years old. Perhaps he was married more than once? Is the age of the mother given on the landing record or the birth records of 1755, 1760 and/or 1763?
That's all I have so far; hopefully this has gotten you half an inch closer to cracking your brick wall.
