Title: Bill Haas
Content:  William Harlan Haas (born May 24, 1982) is an American professional golfer who plays on the PGA Tour and won the 2011 FedEx Cup. He is the son of former PGA Tour player Jay Haas.
Title: Bill Haas
Content:  Haas comes from a distinguished family of golfers. His father is nine-time PGA Tour winner, Jay Haas. His brother, Jay Haas Jr., and uncle, Jerry Haas, are former PGA Tour players. He is a great nephew of 1968 Masters Tournament winner, Bob Goalby. Haas and his father won the CVS Caremark Charity Classic in 2004, an unofficial PGA Tour event. On February 13, 2018, Haas was involved in an automobile accident in Pacific Palisades, California in which the driver, Mark Gibello, was pronounced dead. The following day, Haas was released from the hospital after treatment for an injury from the accident and released a statement saying that he would withdraw from the ongoing Genesis Open.
Title: Bill Haas
Content:  Haas was born in Charlotte, North Carolina, and was raised in Greer, South Carolina, a suburb of Greenville. He was the third member of his family to play golf at Wake Forest University in Winston-Salem, North Carolina, following his father, Jay, and uncle, Jerry.
Title: Walter A. Haas Jr.
Content:  Haas was born to a Jewish family in San Francisco, the son of Elise (née Stern) and Walter A. Haas. His mother was the daughter of Sigmund Stern (the nephew of Levi Strauss and the son of David Stern); and Rosalie (née Meyer) Stern (the daughter of Harriet Newmark Meyer and Marc Eugene Meyer; and the granddaughter of rabbi Joseph Newmark). Haas graduated from the University of California, Berkeley in 1937. His father was a prominent supporter of the university; the Haas School of Business was named in his honor. Haas attended the Harvard Business School and earned an MBA in 1939.
Title: Peter E. Haas Jr.
Content:  Haas was born in San Francisco, the son of Josephine (née Baum) and Peter E. Haas. His father was Jewish and his mother was a gentile from Kaw City, Oklahoma. He has two siblings: Margaret Haas Jones and Michael Stern Haas (predeceased). He graduated from Stanford University in 1969. In 1972, he was appointed as a manager at the Levi Strauss Company. Thereafter, he served in various capacities at the Levi Strauss Company. In 1980, he was named as vice president and general manager of the Menswear Division. In 1982, he was appointed Director of Materials Management for Levi Strauss USA. In 1996, he along with his father and cousin, Robert D. Haas, led a $2.5 billion 
Title: Jerry Haas
Content:  Haas comes from a distinguished family of golfers. He is a nephew of 1968 Masters winner Bob Goalby, and has several other relations in golf including his brother Jay, nephews Bill and Jay Jr., and brother-in-law Dillard Pruitt. Jerry coached Bill at Wake Forest.
Title: Walter A. Haas
Content:  Haas was born to a Jewish family, one of four children of Abraham Haas and Fanny Koshland. His father was an immigrant from Bavaria who founded the Hellman, Haas and Company which eventually became the Smart & Final grocery store chain. His mother was the daughter of Simon Koshland, one of the most successful wool merchants in San Francisco. His siblings were Charles, Ruth (1891), and Eleanor (1900). In 1910, Haas graduated from the University of California, Berkeley, where he was a member of the Order of the Golden Bear. Haas served in the U.S. Army Field Artillery during World War I.
Title: Peter E. Haas Jr.
Content:  Haas was married to Joanne Christensen until her death. They had three children: Jennifer C. Haas, Daniel Haas, and Bradley Haas. He is remarried to Ginnie Haas. Haas also has two stepbrothers from his father's second marriage to Miriam "Mimi" Lurie: Ari Lurie and Daniel Lurie. Upon his father's death in 2005, his father's interest in Levi Strauss (worth $1.9 billion in 1999) was passed to Haas, his stepmother Mimi Haas, and his sister.
Title: Walter J. Haas
Content:  Haas was born the son of Evelyn (née Danzig) and Walter A. Haas Jr. He has two siblings: Robert D. Haas; and Betsy Haas Eisenhardt (married to Roy Eisenhardt).
Title: Walter F. Haas
Content:  Haas, the eldest in a family of eight children, was born November 12, 1869, in California, Missouri, the son of John B. Haas and Lina W. Bruere. He was brought to Los Angeles at the age of 15 in 1884 or 1885 and graduated from Los Angeles High School in 1889, after which he read law in the office of Houghton, Silent & Campbell. He was a member of the Union League Club, Palestine Lodge 351 of the F.&A.M. and the Scottish Rite Masons. Haas died of a heart attack at age 66 in his Alhambra, California, home on February 17, 1936. A funeral service was held in the Scottish Rite Cathedral, 929 South Hope Street, Los Angeles, followed by cremation. Survivors were three brothers—John B. Haas, Gustave Haas and Charles E. Haas—and two sisters.

Question: Who is the father of Bill Haas?
Answer: Jay Haas.