Elvira Davis and Elmira Davis Young
1850 Census Records
Hartsgrove, Ashtabula County, Ohio
Young, William - 29 yrs old, male, Farmer, Value of Real Estate: $1530, Born in New York.
Young, Almira - 20 yrs. old, female, Born in New Hampshire.
Young, Elbert - 1 yrs old., male, born in Ohio.
Davis, Elvira - 20 yrs old, female, Born in New Hampshire.

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Almira and Elvira are twin sisters. Father is Nathan Davis and Catherine Sanborn Davis  Betsey Young is most likely the mother of William Young, although not proven yet.  They lived next door to each other.