Proto-Austronesian *apu

→ Bikol Central apo (inherited)

→ Cebuano apo (inherited)

→ Hiligaynon apo (inherited)

→ Ibaloi apo (inherited)

→ Ilocano apo (inherited)

→ Kayapa Kallahan apo (inherited)

→ Kankanaey apo (inherited)

→ Maori tupuna (derived)

→ Yami apo (inherited)

→ Thai ปู่ (cognate)

→ Tagalog apo (inherited)

→ Waray-Waray apo (inherited)