Stu is a diminutive of Stuart. Stuart is derived from the Old English name 'Stigweard', itself derived from the words 'stig', which means 'a household', and 'weard', which means 'a guardian'.
namehang.com
Stu is a diminutive of Stuart. Stuart is derived from the Old English name 'Stigweard', itself derived from the words 'stig', which means 'a household', and 'weard', which means 'a guardian'.