Gates was born in Seattle, Washington on October 28, 1955. He is the son of William H. Gates Sr. [b] (b. 1925) and Mary Maxwell Gates (1929–1994). His ancestry includes English, German, Irish, and Scots-Irish. His father was a prominent lawyer, and his mother served on the board of directors for First Interstate BancSystem and the United Way. Gates' maternal grandfather was J. W, Maxwell, a national bank president. Gates has one older sister, Kristi (Kristianne), and a younger sister, Libby. He is the fourth of his name in his family, but is known as William Gates III or "Trey" because his father had the "II" suffix. Early on in his life, Gates observed that his parents wanted him to pursue a law career. When Gates was young, his family regularly attended a church of the Congregational Christian Churches, a Protestant Reformed denomination. The family encouraged competition; one visitor reported that "it didn't matter whether it was hearts or pickleball or swimming to the dock . . . there was always a reward for winning and there was always a penalty for losing".