New York-based Lohan, 27, features in an eight-part documentary series with Oprah Winfrey beginning this Sunday.
Research conducted by genealogists in recent weeks has thrown up possible links to the star’s Irish ancestry.
Lindsay’s mother, Dina Sullivan, came from a well-known Irish-American family that traced its roots back to Co Cork. The family were politically conservative and Lindsay’s great grandfather John L Sullivan, is reported to have founded the Long Island Pro-Life Party. A search of the 1911 census threw up a John L Sullivan living in a house at 17 Spital Lands in Pouladuff, Blackrock, Cork.
The initial search, conducted by the Cork Genealogical Society showed that this John L Sullivan was documented as aged 17 at the time. He was the son of head of the household Hannah Sullivan, 52, living with five siblings, Mary, William, Catherine, Patrick and Michael, ranging in age from 10 to 29.
The records reveal another possible match, a John L Sullivan, born in Bantry on September 8, 1891. A US registration card documented this John L Sullivan as living in New York City and working as an examiner in the financial district in June 1917.
The name Lohan is a common name around the village of Creggs, in east Galway, near the Roscommon border.
Birth records also show a Richard Lohan — the name of Lindsay’s paternal grandfather — born in Glenamaddy in 1917.
The former wild child actress has been working hard to stay sober following a 90-day court-ordered stint in rehab last year.
In a trailer for the documentary she breaks down in tears and tells a friend she feels like a prisoner “all the time” due to the paparazzi.
“I know my career hangs in the balance,” she tells Oprah. “I know this is my last shot at doing what I love to do.”
Lindsay’s documentary will premiere on the Oprah Winfrey Network on Sunday, March 9.