Father of Michelle Obama - his death record:
"Illinois, Cook County Deaths, 1878-1994," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2MV-NB1C : 18 March 2018), Fraser Robinson, 06 Mar 1991; citing Chicago, Cook, Illinois, United States, source reference , record number , Cook County Courthouse, Chicago; FHL microfilm .
Michelle's parents are Fraser Robinson and Marian Lois Shields.