The name Otta is a variant of Ottah.
Ottah is not popular as a baby name for boys. It is not listed within the top 1000 names.
Baby names that sound like Ottah include Oddo (German and Italian), Ode (English), Oded (Hebrew), Odie (English), Odo (German, Italian, and Scandinavian), Ody (English), Ohad (Hebrew), Oidhchee, Oidhchey, Oidhchi, Oidhchie, Oidhchy, Oto (Basque, Czech, Italian, Slavic, and Spanish), Otoe, Otou, Aude, Otoway, Oidhche, and Aud.
† English pronunciation for Ottah: OW as in "oak (OW.K)" ; T as in "tee (T.IY)" ; AA as in "odd (AA.D)"