I found another daughter of Antonio Posadas and María Antonia Quiros named Lusia Rosalia, but no grandparents.
Name: Lusia Rosalia Pozadas Quiroz
Gender: Female
Christening Date: 26 Dec 1763
Christening Place: SAN COSME,VILLA DE COS,ZACATECAS,MEXICO
Father's Name: Anto. Pozadas
Mother's Name: Anta. Quiroz
Indexing Project (Batch) Number: K60118-2
System Origin: Mexico-ODM
GS Film number: 1095153
Citing this Record
"México bautismos, 1560-1950," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:NVXP-89V : 10 February 2018), Anta. Quiroz in entry for Lusia Rosalia Pozadas Quiroz, 26 Dec 1763; citing SAN COSME,VILLA DE COS,ZACATECAS,MEXICO, reference ; FHL microfilm 1,095,153.
Another Daughter
I found another daughter of Antonio Posadas and María Antonia Quiros named Lusia Rosalia, but no grandparents.
Name: Lusia Rosalia Pozadas Quiroz
Gender: Female
Christening Date: 26 Dec 1763
Christening Place: SAN COSME,VILLA DE COS,ZACATECAS,MEXICO
Father's Name: Anto. Pozadas
Mother's Name: Anta. Quiroz
Indexing Project (Batch) Number: K60118-2
System Origin: Mexico-ODM
GS Film number: 1095153
Citing this Record
"México bautismos, 1560-1950," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:NVXP-89V : 10 February 2018), Anta. Quiroz in entry for Lusia Rosalia Pozadas Quiroz, 26 Dec 1763; citing SAN COSME,VILLA DE COS,ZACATECAS,MEXICO, reference ; FHL microfilm 1,095,153.
"México, Zacatecas, registros parroquiales, 1605-1980," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:939N-1MVB-5?cc=1804458&wc=3PSH-MNL%3A147565401%2C147565402%2C147715501 : 21 May 2014), Villa de Cos > San Cosme > Bautismos 1757-1764, 1775-1787 > image 196 of 626; paróquias Católicas, Zacatecas (Catholic Church parishes, Zacatecas).