There's at least four artists under the name "Otto":
1.The composer, singer and percussionist Otto was born in Pernambuco, Brazil, and he was, among Chico Science, Fred 04 and others, a Manguebeat movement creator, that was a revolution to the Brazilian music. 2. aka DJ Toto from Colombia, who has avery nice release on the net-label Corporate Identity (http://www.corpid-label.de/) 3.A Turkish hardcore band from the Istanbul underground music scene To see the German comedian-act, director (and musician too) Otto Waalkes, click here: http://www.last.fm/music/Otto+Waalkes

Read more about Otto on Last.fm.