Énna Mac Murchada, or Enna Mac Murchada, also known as Énna mac Donnchada, and Énna mac Donnchada mic Murchada, was a twelfth-century ruler of Uí Chennselaig, Leinster, and Dublin.
 Énna was a member of the Meic Murchada, a branch of the Uí Chennselaig dynasty that came to power in Leinster in the person of his paternal great-grandfather.
 Énna himself gained power following the death of his cousin Diarmait mac Énna.
 Throughout much of his reign, Énna acknowledged the overlordship of Toirdelbach Ua Conchobair, King of Connacht, although he participated in a failed revolt against the latter in 1124 before making amends.
 When Énna died in 1126, Toirdelbach successfully took advantage of the resulting power vacuum.
Hugh I (d. after 1093), Count of Dammartin and Seigneur de Bulles, son of Manasses, Count of Dammartin, and Constance of France.
 Hugh’s maternal grandfather was Robert the Pious, King of France, and his paternal great-grandfather was Hilduin I, Count of Montdidier.
Odo (Eudes) (d. after 1061), Count of Dammartin, son of Manasses, Count of Dammartin, and Constance of France.
 Odo’s maternal grandfather was Robert the Pious, King of France, and his paternal great-grandfather was Hilduin I, Count of Montdidier.
John Davison Rockefeller Sr. (July 8, 1839 – May 23, 1937) was an American oil industry business magnate and philanthropist.
 Widely considered the wealthiest American of all time and the richest person in modern history, Rockefeller was born into a large family in upstate New York and was shaped by his con man father and religious mother.
 His family moved several times before eventually settling in Cleveland, Ohio.
The Reverend Horatius Holypheal Coleman (February 22, 1892 - December 13, 1969), better known as H. H. Coleman, was an American church pastor and evangelist.
 Reverend Coleman, who was born in Decatur, Georgia, was senior pastor of Greater Macedonia Baptist Church in Detroit, Michigan, from 1935 until his death in 1969.
 He was the paternal great-grandfather of former U.S. Representative Kendrick B. Meek, and the maternal grandfather of actress Barbara Meek.
Mary French Rockefeller (May 1, 1910 – April 17, 1997) was an heiress, socialite, philanthropist, and a member of the extensive Rockefeller family.
 She was married to Laurance Rockefeller, son of John Davison Rockefeller Jr. and Abby Aldrich Rockefeller.
 She was the mother of Laura Rockefeller Chasin, Marion Rockefeller Weber, Lucy Rockefeller Waletzky, and Laurance Spelman Rockefeller Jr.
Marion Rockefeller Weber (born 1938) is the second eldest daughter of Laurance Spelman Rockefeller (1910–2004) and Mary French and a fourth generation member of the Rockefeller family.
 Her paternal great-grandfather is Standard Oil's founder John D. Rockefeller and maternal great-grandfather is Frederick Billings, a president of Northern Pacific Railway.
Laura Spelman Rockefeller (October 11, 1936 – November 17, 2015) was an American philanthropist.
 She was the eldest child of Laurance Spelman Rockefeller (1910–2004) and Mary French (1910–1997), and a fourth generation member of the Rockefeller family.
 She has two younger sisters, Marion, Lucy Aldrich Rockefeller, and a younger brother, Laurance Spelman Rockefeller Jr..
 Her patrilineal great-grandfather was Standard Oil's co-founder John D. Rockefeller and her matrilineal great-grandfather was Frederick H. Billings, a president of Northern Pacific Railway.
 Both of her grandmothers, Mary Billings French and Abby Aldrich Rockefeller, were important to the early development of YWCA USA.
 Chasin is known as the founder, former executive director, and former board member of the Public Conversations Project in Watertown, Massachusetts.
James Jacobus Roosevelt (October 25, 1759 – August 13, 1840) was an American businessman from New York City who was a member of the prominent Roosevelt family and the paternal great-grandfather of U.S. President Theodore Roosevelt.
Tiberius Claudius Nero, often known as Tiberius Nero and Nero (85–33 BC) was a politician who lived in the last century of the Roman Republic.
 He was the natural father of the second Roman emperor Tiberius, who became the stepson of the emperor Augustus and was adopted by Augustus as his heir, and Roman general Nero Claudius Drusus.
 He was also the paternal grandfather of Emperor Claudius, General Germanicus, and Consul Drusus Julius Caesar, paternal great-grandfather of Emperor Caligula and Empresses Agrippina the Younger and Claudia Octavia and maternal great-great-grandfather of Emperor Nero.

Question: What nationality was Marion Rockefeller Weber's paternal great-grandfather?
Answer: American