Joseph and Alice Snyder were living at Paw Paw town, Morgan, West Virginia, and had been married 9 years at the time of the 1900 census.The household consisted of: Household Gender Age HeadJoseph SnyderMborn January 1870 Maryland SpouseAlice SnyderFborn May 1870 Pennsylvania ChildSusie SnyderFborn July 1893 Pennsylvania ChildAda M SnyderFborn April 1896 Pennsylvania ChildMabel SnyderF born April 1898 West Virginia The 1900 census record for this family is here: https://familysearch.org/pal:/MM9.1.1/M9Z3-NSM
By 1910 the family had moved to Cumberland Ward 6, Allegany, Maryland: HeadJoseph W SnyderM 41y SpouseAlice SnyderF 41y ChildSusie SnyderF 18y ChildAda SnyderF 16y ChildMabel SnyderF 12y ChildWilliam SnyderM 4y born Maryland Grace GradyF 15y born Maryland The 1910 census is here: https://familysearch.org/pal:/MM9.1.1/M2XJ-BS8
For the 1920 census of Allegheny, Maryland, Alice is the head-of-household, with 3 children living there: Household Gender Age HeadAlice SnyderF 51y ChildAda SnyderF 24y ChildWilliam SnyderM 13y ChildRobert SnyderM 8y born Maryland The 1920 census record is here: https://familysearch.org/pal:/MM9.1.1/M63Q-F6X
Clara Mabel Snyder was born at Great Capon, Morgan, W. Virginia, the daughter of Joseph Snyder and Alice True.Her birth record is here: https://familysearch.org/pal:/MM9.1.1/X55P-M4D
I can't find birth records for the other children.