StillWell, (previously known as Capital Q), is an American rock band formed by Q-Unique,  Reginald "Fieldy" Arvizu from Korn, and drummer Wuv from P.O.D.. The band has two albums and one EP. The band has recently released their second studio album, Raise It Up on November 13, 2015.

Stilwell or Stillwell may refer to:

• Arthur Stilwell, Kansas City Southern Railway founder
• Bill Stilwell, Author and naturalist, author of three national best-sellers
• Frank Stilwell, Old West outlaw
• G. R. Stilwell, of the Ives–Stilwell experiment
• Heather Stilwell, school trustee in Surrey, British Columbia
• John Stillwell, Australian mathematician
• Joseph Stilwell, U.S. Army four-star general
• Joseph Warren Stilwell, Jr, U.S. Army general, son of Joseph Stilwell
• Lewis B. Stillwell, an American electrical engineer and the president of AIEE from 1909 to 1910
• Natasha Stillwell, Canadian TV producer and Daily Planet and former co-host
• Richard G. Stilwell, U.S. Army general
• Roger Stillwell, Interior Department employee tied to Jack Abramoff
• Silas M. Stilwell (1800–1881), American politician who sat in the Tennessee, Virginia and New York legislatures
• Simpson E. Stilwell, Indian fighter, U.S. Army scout, judge
• Stephen J. Stilwell (1866–1942), New York politician