first name. Conversely, the existing single word name can be used as the given or first name and then "Lnu" (last name unknown) may be added as the family, surname or last name. This can lead to the misconception that "Lnu" is a common Indonesian surname. In some cases "Fnu" will be used as the surname or last name. Third, the existing single word name may be duplicated to give a first name and surname such as "Hasan Hasan". Fourth, the practice of the U.S. Patent and Trademark Office is to record the single-word name as a first or given name, and to enter a period for the surname. Origin of names in Indonesia Local family/clan names There are some Indonesian ethnic groups or tribes whose people do maintain a family, last, or surname. These include the: Alas people of Aceh, for example, Keruas, Kepale Dese, or Pagan. Royalties and nobles from the Sundanese people or Bantenese of Java, for example, Kusumah, Djajadiningrat, Soerjaatmadja, Martadinata, or Prawiranegara. Batak people of Sumatra, for example, Nasution, Hutagaol, Sitompul, Karokaro, Rajagukguk, or Sinaga. Nias people and people of the islands off the west coast of Sumatra, for example, Amuata, Falakhi, Laoly, Marunduri, Ote, or Wau. Minangkabau people of Sumatra, for example, Bodi, Caniago, Sikumbang, Koto, or Piliang. Tribes and royalty in Lampung, for example, Djayasinga, Badak, Limau, Gunungalip, or Way Tube. Christian Betawi people, for example, Baidan, Djaim, or Senen. Royalty and nobles from the Javanese people, for example, Sastrowardoyo, Djojohadikusumo, or Kolopaking. Dayak people of Kalimantan, for example, Tingang, Unus, Apui, Usat, Laing, Danum, Riwut, Usop, Narang, Undjung, Ngampar, Gohong, Baboe, Huang, Lambung, Djinu. Minahasan people from North Sulawesi, for example, Karamoy, Mogot, Nelwan, Tendean, or Walian. Sangirese people from North Sulawesi for example, Kansil, Manansang, Manganang, Mohede, or Tatengkeng. Toraja people from South Sulawesi for example, Batusura, Lumba, Rambulangi, or Manganan. Ethnic groups in the Molucca Islands, for example, Malaiholo, Hehamahua, Sahanaya, or Sahilatua. Various ethnic groups in East Nusa Tenggara use surnames native to the region—some of these surnames include Hurek, Riberu, Seda, Messakh, and Keraf. There are also Portuguese surnames (typically found in the eastern portion of Flores) due to Portuguese influence in the region during colonial times, such as Fernandez, Diaz, Pareira, da Lopez, da Cunha, de Rosario, and others. Various ethnic groups in West Papua—There are more than 200 ethnic groups in West Papua, and surnames are