Using the advanced search on the Social Security Death Index, I entered just the first name (Ules) with the date of birth and found
Ules Siebert SSN 332-12-6258 Residence:62221Belleville, Saint Clair, IL Born 23 Dec 1892 Died Nov 1973 [SS Number] Issued:IL (Before 1951)
My guess is that your Ules may have remarried after her first husband died. If this is indeed her, then St. Clair County will probably have all the records you need on her. Good luck and let us know how it goes.