Frederick Julius "Fritz" Müller, Sr. was a son of of Michel Müller of Alsace and O' Delia (Zinter) Müller of Louisiana.

His siblings include:
Michel Karl Müller
O'Delia Emelia Müller
Sophie Marie (Müller) Darphin
Wilhelm Emil "Bill" Müller, Sr.
Marie "Mary" (Müller) Garber
Lina K. (Müller) Jamison
Jacob E. Müller
Anna C. (Müller) Wilson

He was married to Mrs. Alice Müller.

CENSUS RECORDS

1900 US CENSUS
Ward 4, Acadia Parish, Louisiana
July 5, 1900
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DWELLING 425/FAMILY 428
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MÜLLER, Michel, head, w, m, Feb. 1870, 30, married 6 years, Germany, Germany, Germany, immigrated to USA in 1891, in USA 9 years, naturalized, farmer
MÜLLER, Odellia (ZINTER), wife, w, f, Jan. 1878, 22, married 6 years, 3 children, 3 living, Louisiana, Germany, Germany
MÜLLER, Michel, son, w, m, Oct. 1896, 3, single, Louisiana, Germany, Louisiana
MÜLLER, Fritz, son, w, m, Aug. 1898, 1, single, Louisiana, Germany, Louisiana
MÜLLER, William, son, w, m, Mar. 1900, 2 months, single, Louisiana, Germany, Louisiana
MÜLLER, Cathrine, sister-in-law, w, f, May 1875, 25, widow, 3 children, 2 living, Germany, Germany, Germany, immigrated to USA in 1892, in USA 8 years
MÜLLER, George, nephew, w, m, Jan. 1896, 4, single, Louisiana, Germany, Germany
MÜLLER, Emile, nephew, w, m, Sept. 1897, 2, single, Louisiana, Germany, Germany
MÜLLER, Emile, brother, w, m, June 1876, 23, single, Germany, Germany, Germany, immigrated to USA in 1899, in USA 1 year, farmer

1910 US CENSUS
Ward 4, Township 8, Iota Village, Acadia Parish, Louisiana
April 18, 1910
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DWELLING 5 / FAMILY 5
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MULLER, Mitchel, head, m, w, 39, married once for 16 years, Germany, Germany, Germany, immigrated to USA in 1891, naturalized, farmer, general farm
MULLER, Delia [ZINTER], wife, f, w, 32, married once for 16 years, 8 children, 6 living, Louisiana, Germany, Germany,
MULLER, Mitchel Karl, son, m, w, 13, single, Louisiana, Germany, Louisiana
MULLER, Fritz Julius, son, m, w, 11, single, Louisiana, Germany, Louisiana
MULLER, William Amile, son, m, w, 10, single, Louisiana, Germany, Louisiana
MULLER, Delia Amelia, daughter, f, w, 8, single, Louisiana, Germany, Louisiana
MULLER, Sophie Mary, daughter, f, w, 5, single, Louisiana, Germany, Louisiana
MULLER, Mary, daughter, f, w, 3, single, Louisiana, Germany, Louisiana
LETZ, Jackob, head, m, w, 19, Germany, Germany, Germany, laborer, general farm

1920 US CENSUS
Ward 4, Town of Iota, Acadia Parish, Louisiana
January 13, 1920
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DWELLING 25 / FAMILY 25
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MÜLLER, Mitchel, head, m, w, 59, widow, immigrated to USA in 1891, naturalized in 1897, Alsace, Alsace, Alsace, horse and mule sales, selling stock
MÜLLER, Fritz J., son, m, w, 21, single, Louisiana, Alsace, Louisiana, bookkeeper, bank
MÜLLER, William E., son, m, w, 19, single, Louisiana, Alsace, Louisiana, butcher, meat market
MÜLLER, Delia, daughter, f, w, 17, single, Louisiana, Alsace, Louisiana, none
MÜLLER, Sophie, daughter, f, w, 15, single, Louisiana, Alsace, Louisiana, none
MÜLLER, Mary, daughter, f, w, 13, single, Louisiana, Alsace, Louisiana, none
MÜLLER, Lena, daughter, f, w, 9, single, Louisiana, Alsace, Louisiana, none
MÜLLER, Jacob E., son, m, w, 7, single, Louisiana, Alsace, Louisiana, none
MÜLLER, Anna, daughter, f, w, 4 years 4 months, single, Louisiana, Alsace, Louisiana, none
ZENTER, Johnnie, nephew, m, w, 17, single, Louisiana, Louisiana, Louisiana, none
LETZ, Jacob, nephew, m, w, 18, single, immigrated to USA in 1906, naturalized in 1915, Alsace, Alsace, Alsace, mechanic, garage

1930 US CENSUS
Ward 4, Iota Village, Acadia Parish, Louisiana
Third Street, Iota, Louisiana
April 2, 1930
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DWELLING 23/FAMILY 24
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MULLER, Mitchel, head, m, w, 59, widow, France, France, France, Horse dealer, sale stable
MULLER, O'Delia E., daughter, f, w, 28, single, Louisiana, France, Louisiana, house keeper, private family
MULLER, Marie, daughter, f, w, 23, single, Louisiana, France, Louisiana, nurse, trained nurse
MULLER, Lina K., daughter, f, w, 18, single, Louisiana, France, Louisiana, attending college
MULLER, Jacob E., son, m, w, 17, single, Louisiana, France, Louisiana, meat cutter, butcher shop
MULLER Anna C., daughter, f, w, 15, single, Louisiana, France, Louisiana, none