A municipality of Eastern Samar, Philippines.

World War II American general.

The John D. and Catherine T. MacArthur Foundation is a private foundation that makes grants and impact investments to support non-profit organizations in approximately 117 countries around the world.

Charles Gordon MacArthur (November 5, 1895 – April 21, 1956) was an American playwright, screenwriter, and 1935 winner of the Academy Award for Best Story.

Mary Reid Anderson (née Macarthur; 13 August 1880 – 1 January 1921) was a Scottish suffragist (although at odds with the national groups who were willing to let a minority of women gain the franchise) and was a leading trades unionist.

Renowned British round-the-world sailor.

James Gordon MacArthur (December 8, 1937 – October 28, 2010) was an American actor and recording artist.

The MacArthur Fellows Program, also known as the MacArthur Fellowship and colloquially called the "Genius Grant", is a prize awarded annually by the John D. and Catherine T. MacArthur Foundation to typically between 20 and 30 individuals working in any field who have shown "extraordinary originality and dedication in their creative pursuits and a marked capacity for self-direction" and are citizens or residents of the United States.