From earlier*həpat, fromProto-Austronesian*Səpat.

*əpat

1. four

• Proto-Philippine:*əpat (see there for further descendants)
• Barito
  • East Barito
    • Malagasy:éfatra
  • Northwest Barito
    • Siang:opat
• North Bornean
  • Proto-North Sarawak:*əpat (see there for further descendants)
• Sama-Bajaw
  • Bajaw
    • West Coast Bajau:empat
• Celebic
  • Pamona
    • Pamona:opo
  • Southern Kaili-Pamona
    • Uma:opoʔ
  • Western Munic
    • Muna:paa
  • Wolio-Kamaru
    • Wolio:apa
• Old Javanese:pat
  • Javanese:papat,pat
  • Proto-Lampungic:*paʔ
• Madurese:empak
• Bali-Sasak-Sumbawa
  • Balinese:empat,patpat
  • Sasak:empat
• Proto-Malayic:*əmpat
  • Banjarese:ampat
  • Brunei Malay:ampat
  • Iban:empat
  • Malay:empat
    • Indonesian:empat
  • Minangkabau:ampek
  • Urak Lawoi':ปัจ(pac)
• Sundanese:opat
• Northwest Sumatran
  • Northern Batak
    • Karo Batak:empat
  • Southern Batak
    • Toba Batak:opat
  • Nias-Sikule
    • Nias:õfa
• Simeulue:at
• South Sulawesi
  • Tamanic
    • Embaloh:ampat
  • Makassar
    • Makasar:appaʔ
  • Northern South Sulawesi
    • Mandar:appeʔ
• Proto-Central-Eastern Malayo-Polynesian:*əpat (see there for further descendants)

• Blust's Austronesian Comparative Dictionary – *əpat