Otho \o-tho\ as a boy's name is a variant of Otto (Old German), and the meaning of Otho is "wealth".

The baby name Otho sounds like Otha, Odo, Ota and Ot. Other similar baby names are Oro, Autha, Both, Jeth, Mathe, O-, Oak, Obie, Obi, Odie, Olle, Ole, Ola, Or, Orry, Ozzy, Osei, Othello, Oz, Roth, Rothe, Seth, Theo and Thu.