from Wikipedia:
Udo may refer to:
People
Udo (Obotrite prince) (d. 1028)Udo Dirkschneider (b. 1952), heavy metal vocalistUdo Jürgens (b. 1934), Austrian composer and singerUdo Kasemets (b. 1919), Estonian-Canadian composerUdo Kier (b. 1944), German actorUdo Lattek, German football managerUdo Lindenberg (b. 1946), German rock musician and composerUdo Mechels (b. 1976), Belgian musicianUdo Suzuki, a Japanese comedianUdo Proksch (1934-2001), businessman, industrialist, and murdererUdo of Aachen, fictional 13th century monk, created as a 1999 April Fool's hoaxUdo von Woyrsch, high ranking Nazi SS officier
Places
Udo, Miyazaki, a town in Kyūshū, JapanMount Udo, a hill overlooking Shimizu-ku, Shizuoka, JapanUdo, BurmaUdo Island, an islet off Jeju Island, South Korea
Other
Ultra Density Optical, a disk format for data storage able to store 60GB on 5.25" optical disk using blue laser technology.The udo, a Japanese flowering plant named Aralia cordataU.D.O., 1987 band formed by Udo Dirkschneider
