Ona May Coon is the daughter of Alice Johnson and Winfield Scott Coon.

Ona is 1 of 3 known children of Alice and Winfield Scott Coon. Her siblings are:
• Earl Edwin Coon (1890-1913)
• Dot Edith Coon Eilertsen (1893-1987)

After Ona's mother died in Mercer County, Missouri, her father married Mary Gaiser, the daughter of John Gaiser and Fredrica "Freida" Marlock, on 4 Jul 1895 in Watonga, Blaine County, Oklahoma.

Her father and step-mother are known to have 8 children. Ona's half-siblings are:
• Cecil Arvilia Coon Baxter (1896-1978)
• Roy Joseph Coo (1898-1963)
• Hazel Mary Coon (1900- ? )
• Eva Alice Coon Stolts (1902-1972)
• Gladys Gertrude Coon Staplin (1905-1947)
• Carl Coon (1910-1974)
• James Calvin Coon (1916-1967)
• William Robert Coon (1921-2010)
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Per the 1900 U.S. Census, Ona Coon resided in Milton, Umatilla County, Oregon, with her family. Listed are:
-Scott Coon, age 30, born Jul 1866 Missouri
-Mary Coon, age 28, born Apr 1872 Germany
-Oney Coon, age 12, born May 1888 Kansas
-Earl Coon, age 9, born Aug 1890 Missouri
-Dot Coon, age 6, born Jun 1893 Missouri
-Cecile Coon, age 3, born Aug 1896 Missouri
-Leroy Coon, age 1, born Jun 1898 Nebraska

In 1900, Winfield Scott and Mary are listed as married for 13 years. Mary is listed with 5 children born and 5 children living. Mary is listed as immigrating to the United States in 1881.

NOTE: Scott Coon is also listed in the 1900 U.S. Census living in La Grande, Union County, Oregon. The names and places of birth are the same but 5 of the 7 listed have dates of birth different by 1 or 2 years.

In 1909, Ona married Louis Harrison Rothlisberger, the son of John Emil Rothlisberger and Ethel Bertha Cotton. They divorced in 1935.

Washington Marriage Certificate: 8312
-Groom: Louis H. Rothlisberger
-Residence: Kittitas County, Washington
-Bride: Ana [sic] M Coon
-Residence: Kittitas County, Washington
-Marriage Date: 8 Jun 1909
-Marriage Place: Pierce County, Washington
-Witness: Frances S. Ettinger
-Witness: Effa C. Hicks
-Performed by: Duncan Mathson, Clergyman

Per the 1910 U.S. Census, Ona and Louis Rothlisberger resided in Cle Elum Ward 1, Kittitas County, Washington (Enumerated April 1910). Listed are:
-Louis Rothlisberger, age 22, born Washington
-Ona M Rothlisberger, age 22, born Missouri
-Ona A Rothlisberger, age 1/12, born Washington

In 1910, Louis and Ona are listed as married 0 years. Ona is listed with 1 child born and 1 child living.

Per the 1920 U.S. Census, Ona and Louis Rothlisberger resided in Colville, Stevens County, Washington, on 740 Beech Ave. (Enumerated 5 Jan 1920). Listed are:
-L H Rothlisberger, age 32, born Washington
-Ona M Rothlisberger, age 32, born Missouri
-Aleta Rothlisberger, age 9, born Washington
-Howard Rothlisberger, age 2 11/12, born Washington
-John Rothlisberger, age 10/12, born Washington

Per the 1930 U.S. Census, Ona and Louis Rothlisberger resided in Los Angeles, Los Angeles County, California on 3350 Laclede Ave. Listed are:
-Louis H Rothlisberger, age 41, born Washington
-Ona Rothlisberger, age 41, born Missouri
-Aleta Rothlisberger, age 20, born Washington
-Howard Rothlisberger, age 13, born Washington
-John Rothlisberger, age 11, born Washington
-Miriam Rothlisberger, age 9, born Washington
-Roger Rothlisberger, age 7, born Washington

In 1930, Louis is listed as first married at age 21. Ona is listed as first married at age 21.

Ona and Louis are known to have 6 children:
• Ona Aleta Rothlisberger Pollin (1910-2009)
• Robert Louis Rothlisberger (1912-1912)
• Louis Howard Rothlisberger (1917-1951)
• John Frederick Rothlisberger (1919-1987)
• Miriam Rothlisberger (Abt 1921- ? )
• Roger Warren Rothlisberger (1922-2004)

California Death Index, 1940-1997
-Name: Ona May Rothlisberger
-Gender: Female
-Birth Date: 13 May 1891
-Birth Place: Missouri
-Death Date: 2 Jan 1959
-Death Place: Santa Clara
-Mother's Maiden Name: Johnson
-Father's Surname: Coon
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Based on other records and considering the picture of Ona with her younger brother and sister, Ona was born in 1888 rather than 1891 which is on her gravestone and death certificate.
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