b. 25 September 1869, d. 21 December 1937
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Birth (Possible) | September 1868 | According to at least one source, her birthdate was September 1868 birthplace was Missouri. |
| Birth | 25 September 1869 | Anna Maria Gumper was born on 25 September 1869 in Oberlenningen, Germany. |
| Emigration
(Witness)
| April 1884 | She emigrated with David Gumper in April 1884.  |
| Marriage | about 1886 | Anna Maria Gumper and Edward Heinlein, son of John Heinlein and Mary Berger, were married about 1886. |
| Cen-Head
(Enumerated with) | 12 June 1900 | The 1900 US Census listed Anna Maria Gumper in addition to Bertha Heinlein, Arnold Edward Heinlein, Minnie Heinlein and Albert Joseph Heinlein in the household of Edward Heinlein, in Boeuf Township, Gasconade County, Missouri. |
| Cen-Enum | 12 June 1900 | Anna Maria Gumper was enumerated as Mary Heinlein. Married white female, age 31. Wife of head of household. She was born September 1868. Married 13 years. Mother of 4 children, 4 still living. She was born in Missouri. Her mother and father were born in Germany. She can read, write and speak English. |
| Cen-Head
(Enumerated with) | 15 April 1910 | The 1910 US Census listed Anna Maria Gumper in addition to Arnold Edward Heinlein, Minnie Heinlein, Albert Joseph Heinlein and Benjamin G. Heinlein in the household of Edward Heinlein, in Boeuf Township, Gasconade County, Missouri. |
| Cen-Enum | 15 April 1910 | Anna Maria Gumper was enumerated as Mary Heinlein. Married white female, age 42. Wife of head of household. Married 24 years. Mother of 6 children, 6 still living. She was born in Germany. Her mother and father were born in Germany. She immigrated to the U.S. in 1884. She can speak English. She has no occupation. She can read and write. |
| Cen-Head
(Enumerated with) | 16 January 1920 | The 1920 US Census listed Anna Maria Gumper in addition to Arnold Edward Heinlein, Ida Meyer and Benjamin G. Heinlein in the household of Edward Heinlein, in Boeuf Township, Gasconade County, Missouri. |
| Cen-Head
(Enumerated with) | 2 April 1930 | The 1930 US Census listed Anna Maria Gumper in addition to Ida Meyer and Benjamin G. Heinlein in the household of Arnold Edward Heinlein, in Boeuf Township, Gasconade County, Missouri. |
| Cen-Enum | 2 April 1930 | Anna Maria Gumper was enumerated as Marie A. Heinlein. Widowed white female, age 61. Mothter of head of household. She did not attend school within the census year. She can read and write. She was born in Germany. Her mother and father were born in Germany. Their mother tongue is German. She immigrated to the U.S. in 1884 and was naturalized. She can speak English. She has no occupation. |
| Death | 21 December 1937 | She died on 21 December 1937 in Gasconade County, Missouri, at age 68. |
| Burial | 24 December 1937 | She was buried on 24 December 1937 in St. James United Church of Christ Cemetery, Stony Hill, Franklin County, Missouri; Marie Heinlein.  |