Rose (or Rose Mary) Pitre appears with her parents in two census records, 1930 and 1940 in Evangeline Parish, Louisiana. According to census data, we can confirm she was born in late 1926 or early 1930.
At some between 1940 and 1946, Rose married Harry Gallard. She died at age 19 on May 13, 1946, in Eunice, St. Landry Parish, Louisiana.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VYTM-5ZD : accessed 5 October 2016), Moise Petre, Ville Platte, Police Jury Ward 1, Evangeline, Louisiana, United States; citing enumeration district (ED) 20-1, sheet 5A, family 95, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 1400.
"Louisiana Deaths Index, 1850-1875, 1894-1956," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FSBG-2F1 : 12 December 2014), Moise Pitre in entry for Rose Mary Pitre Gillard, 13 May 1946; citing Eunice, St. Landry, Louisiana, certificate number 337, State Archives, Baton Rouge; FHL microfilm 1,221,810.