A variant form of Apo is the name Apu.
Apo is not commonly used as a baby boy name. It is not in the top 1000 names.
Baby names that sound like Apo include Aakav (Indian), Abee, Abou, Abue, Aby, Acab, Afeaf, Afeef, Afeif, Affeef, Affif, Afi (Twi), Afief, Afyf, Agop (Armenian), Ajab, Akif (Arabic), Akiv, Asaf (Hebrew), and Asafe.
† approx English pronunciation for Apo: AH as in "mud (M.AH.D)" ; P as in "pea (P.IY)" ; OW as in "oak (OW.K)"