Tama County, need info on Anton Jarkowsky who married first my gr-grandmother Weaver. Also what connection to Kolash family. All lived near Chelsea, Iowa

In the index of Tama Co. marriages 1853 - 1880 there is this entry:
Anthony Jarkoosky m. Mary Kolash 29 Dec. 1863

Tama County. Looking for parents of Mary Kolash, or death dates for Jarkowsky. Thanks.

John Kolosh d July 26, 1895 wife Anna Kolosh d May 24, 1899
buried Styskal Cemetery, Tama county, Iowa
Their Daughter Mary Kolosh (don't know if she had other brothers or sisters) married December 29, 1863 to Anton Jarkowsky 1/2 brother to Mary Weaver who also worked and lived with John Kolosh family for awhile.
Parents to Mary and Anges Jarkowsky: Mary b December 19, 1845 d August 25, 1882, Antone b July 11, 1841 d 1888.
Their two daughters: Mary and Agnes lived with their grandparents John and Anna Kolosh after Mary's death. The girls were young when their parents passed away.

My grandmother was Mary Weaver, who lived with the Kolash family and was a half-sister to Anton Jarkowsky. I am trying to figure this out, as according the 1880 census Anton was born in 1843 and my grandmother was born in 1858, or about.which makes him a lot older, but not impossible. It would appear then, that their mother married first to Jarkowsky, then Weaver. Their mother would be my great grandmother, and I am trying to search her name, birthplace, or her husbands given name (Weaver). Mary Weaver's parents both died when she was very young but I can't find where they are buried. She went to live with the Kolash family. The connection there appears to be that her half-brother, Anton, married Mary Kolash (daughter to the Kolash family who took her in when an orphan. Any info on the Weaver connection (Mary Weaver's parents) appreciated.