Jan Wondra was first married to Marie (Mary) Svoboda.  Together they had five children.  In the 1880's birth records included how many children the woman had delivered.  Ludmila was born March 10th 1883.  Father John Vondra, occupation blacksmith, mother Mary Vondra maiden name Mary Svoboda.  This is who I believe to be my grandmother Mildred (Vondra) Cervenka

Jeroslav Jerry was the 4th child born January 27th, 1881,  I have located his graduation from Hammond Elementary school in 1895.  This is the year Jan married Rozalie.  Marie Wondra died August 9, 1893

The census of 1880 finds the Wondra family as Wondrach.  This variation of spelling is often found depending on the accent of the speaker and the listening ear of the census taker.  

Josephine the 3rd child married Louis (Alois) Hruska born March 12, 1873 and died December 12, 1965 in Chicago, IL.  Her son George Hruska 1892-1970 was an artist and did drawing work for the Army.  He made a sketch of Jan Vondra. On the back is a note to Mildred that this is her father and his grandfather.

Marie Wondra Korinek 2nd oldest married Joseph Korinek.  She was born in Czechoslovakia Sep 7, 1867 and died Jan 29, 1953 in Chicago. The death was reported by her sister Josephine Hruska. 

The oldest of the children was Joseph Wondra.  He was born in Czechoslovakia about 1864 and died in Chicago March 18, 1884.  In the census of 1880 you remember that it was documented he was in the hospital.  Joseph was single and died at the age of 19.  Further documents need to be ordered to determine cause of death.