Mary-Kate Olsen

Mary-Kate (left) and Ashley Olsen in 2011, Debby Wong /

Place of Birth: Sherman Oaks, Los Angeles, California, United States

Date of Birth: June 13, 1986

Ethnicity: Norwegian, English, German, 1/8th Italian, distant French

Mary-Kate Olsen is an American actress, businessperson, fashion designer, producer, author, and equestrian.

She is the daughter of Jarnette “Jarnie” (Jones) and David “Dave” Olsen. Actresses Ashley Olsen (Ashley Fuller Olsen) and Elizabeth Olsen (Elizabeth Chase Olsen) are her sisters. Mary-Kate and Ashley, who are twins, have appeared in television and films since infancy. Since then, they have appeared in television programs, films, interviews, as well as commercial endorsements. Although they are virtually identical in appearance, they are genetically different fraternal twins.

Mary-Kate’s maternal grandfather was likely Daniel David Jones (the son of Daniel De Jarnette/Dejarnette Jones and Rose Marie Sisto). Mary-Kate’s likely great-grandfather Daniel was the son of Daniel De Jarnette/Dejarnette Jones and Augusta Sophia Manshardt, who was born in Ohio, to German parents. Rose was born in California, to Italian parents, Donato F. Maria/Mario Sisto, Sr., who was born in Ruvo del Monte, Provincia di Potenza, Basilicata, and Celeste Lucia Rubino, who was also born in Potenza.

Mary-Kate’s maternal grandmother is Mary Rose Fuller (the daughter of Arthur Louis Fuller and Nell Esther Rose).

Sources: Genealogy of Mary-Kate Olsen (focusing on her mother’s side) –

Likely Mary-Kate’s maternal great-grandfather, Daniel De Jarnette/Dejarnette Jones, on the 1910 U.S. Census –

Likely Mary-Kate’s maternal great-grandmother, Rose Marie Sisto, on the 1910 U.S. Census –

Marriage record of likely Mary-Kate’s maternal great-grandparents, Daniel De Jarnette/Dejarnette Jones and Rose Marie Sisto –

Information about likely Mary-Kate’s maternal great-great-grandparents, Donato F. Maria/Mario Sisto and Celeste Lucia Rubino –

Mary-Kate’s maternal grandmother, Mary Rose Fuller, on the 1930 U.S. Census –

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