Question: Jenna Bush Hager, is an American teacher, author, and journalist, she and her sister who, were the first twin children of a U.S. president, and is the elder of the fraternal twin daughters?

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Steven Eisenberg: Steven Eisenberg (born June 23, 1970) is a San Diego, California based specialist in Internal Medicine, Hematology and Oncology.  He is known as the "Singing Doctor", having written over 100 songs for his patients tailored to their own situations.  His songwriting was featured on NBC's "The Today Show" with Jenna Bush Hager as well as on HLN with Michaela Pereira.  Eisenberg has helped to establish a number of foundations including: Lyrical Life, EnlightenMed, and Chemotopia.  Eisenberg currently practices at the California Cancer Associates for Research & Excellence (cCARE), a practice he founded.

Jenna Bush Hager: Jenna Bush Hager (born November 25, 1981) is an American teacher, author, and journalist.  She is the younger of the fraternal twin daughters of the 43rd U.S. President George W. Bush and former First Lady Laura Bush, and a granddaughter of the 41st U.S. President George H. W. Bush and former First Lady Barbara Bush.  She and her sister Barbara were the first twin children of a U.S. president.  Hager is an author, an editor-at-large for "Southern Living" magazine, and correspondent for NBC News.

Mary-Kate Olsen: Mary-Kate Olsen (born June 13, 1986) is an American fashion designer, producer, author, businesswoman, equestrian, and former actress.  She co-founded luxury fashion brands The Row, Elizabeth and James, and the more affordable lines Olsenboye and StyleMint alongside her fraternal twin sister Ashley Olsen.  Olsen pursued acting independently as an adult until 2012.  She is an older sister of actress Elizabeth Olsen.

Heirs of Empire: Heirs of Empire is a 1996 military science fiction novel by American writer David Weber.  It is the third novel in the "Dahak" trilogy, after the "de facto" duology of "Mutineers' Moon" and "The Armageddon Inheritance".  "Heirs of Empire" is a stand-alone work that focuses on the adventures and travails of the fraternal twin children of Emperor Colin MacIntyre (who defeated the eponymous mutineers and the Achuultani incursion in " The Armageddon Inheritance") and their three friends.  In 2003, it was republished in the omnibus volume, "Empire from the Ashes".

The Ice Twins: The Ice Twins is a 2015 psychological thriller, written by S.K. Tremayne (a pseudonym for British author and journalist Sean Thomas.) .  Screenwriter Isaac Adamson has adapted the novel for a movie.  The novel describes the troubled lives of Sarah and Angus Moorcroft who lose one of their young twin daughters in an accident.  A year after the tragedy, Angus and Sarah decide to take their surviving twin, Kirstie, to live on a small island off Skye, in Scotland.  Just before the family's move to Scotland, Kirstie claims she is, in fact, her identical twin sister Lydia, supposedly dead.

Barbara Bush (born 1981): Barbara Pierce Bush Jr. (born November 25, 1981) is the elder of the fraternal twin daughters (the other is Jenna Bush Hager) of the 43rd U.S. President George W. Bush and former First Lady Laura Bush.  She is also a granddaughter of the 41st U.S. President George H. W. Bush, and his wife, Barbara Bush, after whom she was named.

Susan Whitson: Susan Dryden Whitson was press secretary to First Lady Laura Bush, the wife of U.S. President George W. Bush.  During the attacks of September 11th, she was flying from Washington to Milwaukee with Attorney General John Ashcroft.  Prior to working at the White House, she was the Deputy Communications Director of the Bush-Cheney '04 campaign and the spokesperson for the President and Mrs. Bush's twin daughters, Barbara and Jenna Bush.  Susan Whitson also worked for the FBI, the US Department of Justice and for Rep. Bob Riley (R-AL), the former governor of Alabama, and Rep. Bill McCollum (R-FL) on Capitol Hill.  She was a high school English teacher at Hoover High School in Birmingham, Alabama.  She attended Auburn University.

Alexander Helios: Alexander Helios (Greek: Ἀλέξανδρος Ἥλιος ; late 40 BC – unknown, but possibly between 29 and 25 BC) was a Ptolemaic prince and was the eldest son of the Macedonian queen Cleopatra VII of Ptolemaic Egypt by Roman triumvir Mark Antony.  Alexander's fraternal twin sister was Cleopatra Selene II.  The twins were of Macedonian Greek and Roman heritage, Cleopatra named her son after her collateral ancestor, Alexander the Great.  His second name in Ancient Greek means "Sun"; this was the counterpart of his twin sister’s second name "Selene" (Σελήνη), meaning "Moon".

Ashley Olsen: Ashley Fuller Olsen (born June 13, 1986) is an American fashion designer, producer, author, businesswoman, and former actress.  She co-founded luxury fashion brands The Row, Elizabeth and James, and the more affordable lines Olsenboye and StyleMint with her fraternal twin sister Mary-Kate Olsen.  She is the older sister of actress Elizabeth Olsen.

Ana's Story: Ana's Story: A Journey of Hope is a non-fiction book, by Jenna Bush, daughter of U.S. President George W. Bush.  Ana's Story is the account of a 17-year-old mother who was born with HIV.  Bush met Ana, identified only by her first name, while an intern for UNICEF in Latin America.  Because of discrimination against AIDS victims, some names and details in the story were altered to protect the subjects.

Supporting paragraphs: Jenna Bush Hager Barbara Bush (born 1981)
Answer: Barbara Pierce Bush Jr.