William Mitchell Lybrand

William Mitchell Lybrand (1867–1960) was an American accountant and one of the founders of the accounting firm Lybrand, Ross Bros. & Montgomery, which later became part of Coopers & Lybrand and eventually merged with Price Waterhouse in 1998 to form PricewaterhouseCoopers (PwC). He contributed to the early development of professional accounting education in the United States and held leading positions in key professional organizations.

Early life and career William M. Lybrand was born in 1867 in Philadelphia, Pennsylvania, to a Methodist minister's family.

Lybrand began his accounting career as a clerk at Bement and Daughtery, a machine tool manufacturer in Philadelphia that used one of the first comprehensive cost accounting systems. After advancing to assistant bookkeeper, he learned its structure directly from the system's designer, John W. Francis, whose methods influenced Lybrand's later view that cost data should be closely linked to financial accounting.

Legacy In 1949, his partners at Lybrand, Ross Bros. & Montgomery established the annual Lybrand Medals (gold, silver, and bronze) to honor his contributions to accounting education and to NACA. The tradition continues under the IMA, which awards the Lybrand Awards for outstanding articles in Strategic Finance and Management Accounting Quarterly.

In 2023, he was posthumously inducted into the Accounting Hall of Fame as its 115th inductee.