This is a possibility? In 1930 Cherry and John Smith are living with grandparents John and Libbie Granger. (Maybe that's were Jr came in- after his grandfather?)
John Granger and Libby/Elizabeth Murray had several daughters. Mabel married 1913, at age, 15 an Al Broderick.. Then she remarried in 1916 Ross Smith. From the records of her siblings, John Granger, children etc. were all b. in aroung Altmar. The parents names and locations are on the various marriage records - too many to fit here. In 1930 Ross A Smith living in Albion, divorced??? I am not familiar with all the local towns, but many of the records are within 10-30 miles of Altmar.
Don't know if any of this helps.
U S Census, 1930 Schroeppel, Oswego, NY
Citing this Record:"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X4T4-JKV
Head John Granger M 75 NY (? His age compared to other census data)
Wife Libbie Granger F 55 NY
Granddau Cherry Smith F 14 NY
Grandson John Smith M 12 NY
New York, County Marriages, 1908-1935
IMAGE SOURCE: https://familysearch.org/pal:/MM9.3.1/TH-267-12651-37085-1?cc=1618491&wc=M9WL-RWT:32382812
Name: Rossie Smith
Residence Altmar
Marriage 18 Mar 1916 Sandy Creek NY
Age: 26 White
Birth (Est) 1890 Altmar
Father Fred Smith
Mother ___ Towsely
Spouse Mable Granger
Age: 18 White
Birth (Est) 1898 Boylston
Father John Granger
Mother Elizabeth Mcarery
Reference ID: 4829
GS Film number: 872942
Digital Folder Number: 004266818
Image Number: 00210
IMAGE SOURCE: https://familysearch.org/pal:/MM9.3.1/TH-267-12651-38320-35?cc=1618491&wc=M9WL-RWT:32382812
Name: Eugene Granger
Age: 21 Birth (Est) 1895 Altmar
Residence Lacona
Father John Granger Birth Altmar
Mother Libbie Murray Oswego
Marriage 10 May 1916 Place Parish, NY
Spouse: Lida Richardson
Age: 17 Birth (Est) 1899
Residence Parish
Father M. W. Sol Richardson Birth Oswego
Mother Miss Mary Spraner Birth Oswego
Reference ID: page 382, 4957
GS Film number: 872942
Digital Folder Number: 004266818
Image Number: 00224
U S Census, 1910 Lorraine, Jefferson, NY
Citing this Record: "United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MPBB-X48
Head John Granger M 50 NY
Wife Elizabeth Granger F 40 NY
Dau Stella Granger F 19 NY
Dau Gladys Granger F 0 NY
Dau Mabel Granger F 10 NY
Son John E Granger M 13 NY
Son Edward Granger M 9 NY
More children of John Granger and Libbie Murray: Mabel, Stella and Gladys (Mabel married Al Broderick at age 15, in 1913
https://familysearch.org/search/record/results?count=20&query=%2Bgivenname%3Ajohn~%20%2Bsurname%3Agranger~%20%2Bbirth_place%3Any~%20%2Bbirth_year%3A1852-1857~%20%2Bspouse_givenname%3Alibbie~
U S Census, 1910 Albion, Oswego, NY
Citing this Record: "United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M5ZL-J7S
Head Fredrick A Smith M 44 NY
Son Ross A Smith M 20 NY
Dau Henrietta G Smith F 16 NY
Dau Harriet Smith F 13 NY
U S Census, 1930 Albion, Oswego, NY
Citing this Record: "United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X4TQ-B6F
Ross A Smith Divorced White Male Age 35