Mary Elizabeth "Lizzie" Pfeffer is the daughter of Johann Friedrich "John" Pfeffer and Sophie Christine Maria "Mary Ann" Schluraff.

Deutschland, Ausgewählte (Chosen) Evangelische (Protestant) Kirchenbücher (church records), 1500-1971 (German Lutheran Baptisms, Marriages, and Burials)
-Name: Marie Elisabeth Pfeffer
-Baptism Date: 14 Feb 1858
-Baptism Place: Memleben, Eckartsberga, Sachsen, Preußen, Deutschland
-Baptism Place: Menz, Memleben u Menz, Sachsen, Deutschland
-Birth Date: 16 Jan 1858
-Father: Johann Friedrich Wilhelm Pfeffer
-Mother: Sophie Christine Marie Pfeffer

It was common in Germany that children were given first names of Saint, like Maria or Anna for girls and Johann (German form), Johannes (Latin form) or John (Americanized form) for boys. The second name became the name they usually went by.
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Per the 1870 US Census, Lizzie Pfeffer resided in McKean Township, Erie County, Pennsylvania. Listed are:
-John Peffer, age 56, born Rhine Boin
-Mary Peffer, age 52, born Switzerland
-John Peffer, age 21, born Pennsylvania
-Mattie Peffer, age 14, born Pennsylvania
-Elisabeth Peffer, age 12, born Pennsylvania
-Frank Peffer, age 10, born Pennsylvania
-Catharine Peffer, age 6, born Pennsylvania
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Per the 1880 US Census, Lizzie Pfeffer resided in McKean Township, Erie County, Pennsylvania. Listed are:
-John Pfeffer, age 64,born Bavaria
-Mary Ann Pfeffer, age 60, born Switzerland
-Martha Pfeffer, age 23, born Pennsylvania, Daughter
-Elizebeath Pfeffer, age 21, born Pennsylvania, Daughter
-Frank Pfeffer, age 19, born Pennsylvania, Son
-Philimena Pfeffer, age 16, born Pennsylvania, Daughter
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Lizzie and Peter Amman applied for a marriage license on 21 May 1887. They were married at St. Francis Xavier Roman Catholic Church by Fr. J.A. Oberhofer on 6 Jun 1887 and was witnessed by Joseph Kalvelage and Anna Dorner. It is believed that they had 2 boys:
• Francis "Frank" Amman (1888-1951)
• William "Bill" Amman (1890-1977)

Lizzie's husband, Peter Amman, died 17 May 1892 at his home in Erie, Pennsylvania from pneumonia according to the obituary in the Erie Dispatch.

Elizabeth Pfeffer Amman and Anton Otteni applied for a marriage license on 8 April 1893 and the license was filed on 11 Apr 1893. They were married at St. Francis Xavier Roman Catholic Church with witnesses William Otteni (Anton's brother) and Martha Pfeffer. (Elizabeth's sister).

Elizabeth and Anton Otteni had one child:
• Anna Elizabeth Otteni Keyes (1893-1970)

Lizzie died on 27 Aug 1895. After her death in Aug 1895, Anton remarried Josephine Wingerter on 21 Feb 1898. Anton and Josephine raised Elizabeth's 2 boys (Francis, & William) until grown. Because Anton was the only father the boys really knew, they chose to use and go by his surname throughout life. William legally changed his name to Otteni 17 Dec, 1945.

(Information provided by Kathleen Otteni Goodhew, Great Granddaughter of Mary Elizabeth "Lizzie" Pfeffer and Peter Amman)
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Erie County, Pennsylvania Marriage Docket, 1893, License 4270
Groom: Anton Otteni
Age: 24
Residence: McKean Township, Erie County, Pa.

Bride: Mrs. Elizabeth Amman
Age: 34
Residence: McKean Township, Erie County, Pa.
Marriage Date: 11 Apr 1893
Marriage Place: Erie County, Pennsylvania
Married by: F. H. Wagner