"Cy" was the son of Sylvester Haynes and Sarah Amelia Ramsey. Shortly after Cy was born in 1859, his mother and he lived with Cy's maternal grandfather, Larkin Ramsey. Sarah married Cy's step-father, William Henry Plummer, in 1875.

Cy married Wilhelmina Emma "Minnie" Simon on 02 Aug 1903 in Calhoun County, Illinois. They were the parents of 9 children. Cy worked doing odd jobs and as a farm laborer in Calhoun County.

Minnie died in 1919 at the age of 34. After her death, Cy and the children continued to live in Calhoun County, Illinois with his mother, Sarah. However, she died in 1923.

While returning from a trip to the grocery store with several family members, Cy was involved in a tragic accident in Highland, Lake County, Indiana. A Grand Trunk train hit the Haynes/Schaefer automobile, and Cy was killed in the wreck, as was his daughter, Ann Schaefer; Ann's husband, Andrew D. "Andy" Schaefer; and 4 of Cy's grandchildren, Earl, Harold, Alby and Marvin Schaefer.

At the time of his death, Cy was 72 years, 7 months and 21 days old. His body was returned to Calhoun County, Illinois for burial at Gueck Cemetery in Batchtown.

Children: 3 daughters, 6 sons.

Father of:
Freda Louise Haynes Kuehl
Luvena Agnes Haynes Null
Anna Lucille "Ann" Haynes Schaefer
William O. "Bill" Haynes
Harvey Homer Haynes
Fred Haynes
Vernon Cyrus "Vern" Haynes, Sr.
Glen C. Haynes
Forrest Karl Haynes

Cy's half-brothers and half-sisters:
James "Clifford" Plummer
William Edwin Plummer
Louisa Abigail "Lulu" Plummer Dixon
Clara A. Plummer Wilkinson
Charles Howard Plummer
Oscar Cleveland "Cleve" Plummer
Rose Esther "Rosy" Plummer
Ella E. Plummer
Ray Plummer
Nora "Edith" Plummer Fowler

Cy‘s step-brothers and step-sister:
Stephen H. Plummer
Thomas E. Plummer
Mary Jane Plummer Ward Bruns