| Name Variation | | Louis Grannemann was also known as Heinreich Louis Grannemann. |
| Birth | 12 May 1872 | He was born on 12 May 1872 in Missouri. |
| Marriage | 10 Oct 1901 | He and Carolina Gumper, daughter of Gottlieb Gumper and Christina Maria Mueller, were married on 10 Oct 1901 in German Evangelical Church, Stony Hill, Gasconade County, Missouri.  |
| 1910 Census | 18 Apr 1910 | Louis Grannemann appeared as head of household in the 1910 Federal Census of Boeuf Township, Gasconade, Missouri, as Louis Grannemann. Living with him was his wife, Carolina, and their children, Richard, Oliver, Milford and Esther. He is a married white male, age 37. Married 8 years. He was born in Missouri. His mother and father were born in Germany. He can speak English. His occupation is farmer on a general farm. He is an employer. He can read and write. He owns his home, it is mortgaged. It is a farm, number 23 on the farn schedule. |
| 1920 Census | 7 Jan 1920 | Louis Grannemann appeared as head of household in the 1920 Federal Census of Boeuf Township, Gasconade County, Missouri, as Louis H. Grannemann. Living with him was his wife, Carolina, and their children, Richard, Oliver, Milford, Esther and Ralph, and their niece, Elda Marie Bopp. He is a married white male, age 47. He owns his home, it is mortgaged. He can read and write. He as born in Missouri. His father was born in Wuerttemberg, his native tongue is German. His mother was born in Missouri. He can speak English. His occupation is famer on a general farm. He is an employer. His farm is number 34 on the farm schedule. |
| 1930 Census | 16 Apr 1930 | Louis Grannemann appeared as head of household in the 1930 Federal Census of Boeuf Township, Gasconade County, Missouri, as Louis H. Grannemann. Living with him was his wife, Carolina, and their children, Oliver, Esther and Ralph. He is a married white male, age 57. He owns his home. He owns a radio set. His home is a farm. He was 29 years old when first married. He did not attend school. He can read and write. He was born in Missouri. His mother and father were born in Germany. He can speak English. His occupation is farmer on his own farm. He is an employer. He is not a veteran of the U.S. military. His farm is number 100 on the farm schedule. |
| Death | 3 Jun 1946 | Louis Grannemann died on 3 Jun 1946 at age 74. |
| Burial | 6 Jun 1946 | He was buried on 6 Jun 1946, age 74, in Saint James Cemetery, located in Stony Hill, Franklin County, Missouri. |
Louis Grannemann