Here is the information for Pierre and Marie Madeliene's parents generation:

Pierre’s parents generation:
Gaspard Schwoerer was born Apr 4 1735 in Meisenthal, Moselle, Lorraine, France.
He is the 5th child of Antoine Schwoerer and Anne Marie Walter. (We are also related via the Walter family line) His occupation was Verrier, Meunier this means glassmaker and miller.
He married twice first to Madeliene Reinberger about 1758 in Wingen-sur-Moder (67).
She was born around 1735 in Wingen and profession is listed as messenger.
They had 3 sons your Pierre and his brothers Nicolas and Martin.

Gaspard married Marie Madeleine Hemmert Oct 8 1771. She was born Jan 12 1742 in Siewiller (67).
They had a daughter Elisbeth, Pierre’s half sister.

I do not have the ancestry of Madeliene Reinberger.

Marie Madeleine’s parents generation: Nicolas Burgun 1st child of Adam BURGUN and Barbe WALTER.
Born le sam 16 Nov 1743 à Meisenthal (57).
Décédé le jeu 22 Aug 1793 à Meisenthal (57) 49 years old

Professions : Verrier: glass merchant, negotiator
Married le mar 08 Jan 1771 à Illingen (66549) 27 years old to Anne Angélique MAISON daughter of
Jean Maison (Haus in German) and Anne Marie Clanche. I do not track these families.
Born le mer 15 Nov 1752 à Merchweiler, Saarland, Germany (D-66589)

I will send grandparents after I work it out. I track the Burgun, Schwoerer and Walter lines. I do not track Maison, Clanche, or Reimberger. So as I work through these older generations there will be some blanks.

Note that Maison, Haus, and sometimes Hoff are all interchangeable depending on where they are living. In the US it can be seen as House. Also Burgun is sometimes seen as Bourgon, Burgundt, and other variations. Schwoerer is also seen as Schverer and Schwerer. This line is related to the famous Burgun-Schverer line of French museum quality glass makers. You can find pieces up for auction for over $10k often at Christies and other antique houses. Another note this line is also related to the Walter-Burgun-Cie lines that had Galle as a decorator and helped set him up in his own business. Both Burgun Schverer and Walter Burgun Cie did overflow work for Galle later on after Galle's designs became so popular. All of these families are intertwined.