The Mary Ann (Yuncker) Voisin [00020] family is listed in the 1930 US Census for Nottawa Township, Isabella, Michigan. Her son Elvin John Joseph Voisin is the only other person listed in the household.

Source: 1930 US Census, Isabella County, Michigan, population schedule, Nottawa Township, enumeration district (ED) 37-16, Page 120-B, Line 98, Dwelling 115, Family 116, Mary Voisin as head of household; digital images, ProQuest, Heritage Quest Online (http://hpl.lib.al.us/ : downloaded 15 July 2005); National Archives and Records Administration micropublication Series T626, Roll 995.