The name Stewart is a masculine given name of Scottish Gaelic origin, derived from the occupational surname Stewart, which means "steward" or "guardian." The name has its roots in the medieval period when the position of a steward, responsible for managing household affairs and estates, was a prominent role.

The earliest recorded use of the name Stewart dates back to the 12th century, when members of the Stewart family held the position of High Stewards of Scotland. The most notable figure was Walter Stewart, who served as the 6th High Steward of Scotland from 1292 to 1326. His son, Robert II, became the first monarch of the House of Stewart when he ascended to the Scottish throne in 1371.

Throughout the medieval and Renaissance periods, the name Stewart gained prominence in Scotland and was associated with the royal lineage. Several Scottish monarchs bore the name, including James I (1394-1437), James II (1430-1460), and James IV (1473-1513). The name also spread beyond Scotland, with notable figures such as Henry Stewart, Lord Darnley (1545-1567), the second husband of Mary, Queen of Scots.

Beyond the realm of royalty, the name Stewart has been carried by various historical figures, including Charles Stewart Parnell (1846-1891), an Irish nationalist politician and leader of the Irish Parliamentary Party, and James Maitland Stewart (1908-1997), the renowned American actor known for his roles in classic films such as "It's a Wonderful Life" and "Rear Window."

Other notable individuals with the given name Stewart include Stewart Granger (1913-1993), a British actor known for his roles in adventure films, and Stewart Udall (1920-2010), an American politician who served as the Secretary of the Interior under Presidents John F. Kennedy and Lyndon B. Johnson.

The name Stewart has also been associated with various literary works, such as the poem "The Lady of the Lake" by Sir Walter Scott, where one of the central characters is named Roderick Dhu, a Highland chieftain of the Clan Alpine, whose given name is Stewart.