Looking for my maternal grandparents in WIlliamsport, Lycoming County, PA

I am the granddaughter, Ann Gribbins and the family genealogist. Great-grandfather was John Malloy b. Nov 1862 in Ireland d. 7-21-1935 in Williamsport, Lycoming County. Wife, Ellen O'Toole was born in 1868 in Ireland, d. May 15, 1927 in Wilmington, DE. Both were buried in the Wildwood Cemetery in Lycoming County. Married in 1890 unk location. Children were Mary 1891, Helen 1893, Charles 1896, and Francis in 1987.  I found Helen but nothing on the rest.  Major brickwall.  Contact me at agribbin@bellsouth.net.