LDS church records provide this information.

Joannes Sledzinski b. 1862 married Francisca Idzik 17 Jul 1877. Their children are:

Josepha b. 2 Apr 1891, d. 18 Apr 1891
Lavislaus b. 11 Aug 1892
Joannes b. 27 Dec 1895
Michael b. 26 Sep 1898

When Francisca died in 1909, Joannes Sledzinski married Joseph Stepska on 2 Jan 1910. Their children are:

Leo b. 8 Jan 1911, d. 10 Mar 1911
Stanislaus b. 14 May 1912