NameJohn Nicholas 
Spouses
Birth2 February 1869
Memo(PA death certificate)
Death9 May 1910
Memo(PA death certificate)
My Comments notes for Catharine W (Spouse 1)
The 1900 Census finds Catherine Nicholas, a widow, living with her sister Sarah (Sallie) Harper also a widow and their mother Catherine Mertz yet a third widow. Calvin F Nicholas born June 1893 lives with them.
By 1910, the household is similar except Catharine Nicholas is missing. Then she is not listed among her mother's living children in her obituary -- so Catharine Nicholas must have died between 1900 and 1910.
Her son Calvin D survived.