The Spanish colonizers reserved the term "Filipino" to refer to Spaniards born in the Philippines. The use of the term was later extended to include Spanish and Chinese mestizos, or those born of mixed Chinese-indio or Spanish-indio descent. Late in the 19th century, José Rizal popularized the use of the term "Filipino" to refer to all those born in the Philippines, including the Indios. When ordered to sign the notification of his death sentence, which described him as a Chinese mestizo, Rizal refused. He went to his death saying that he was "indio puro". The current predominant theory on Austronesian expansion holds that Austronesians settled the Philippine islands through successive southward and eastward seaborne migrations from the Neolithic Austronesian populations of Taiwan.