Multiple citizenship in the context of "Naturalization"

The Swiss people (German: die Schweizer, French: les Suisses, Italian: gli Svizzeri, Romansh: ils Svizzers) are the citizens of the multi-ethnic Swiss Confederation (Switzerland) regardless of ethno-cultural background or people of self-identified Swiss ancestry.

The number of Swiss nationals has grown from 1.7 million in 1815 to 8.7 million in 2020. More than 1.5 million Swiss citizens hold multiple citizenship. About 11% of citizens live abroad (0.8 million, of whom 0.6 million hold multiple citizenship). About 60% of those living abroad reside in the European Union (0.46 million). The largest groups of Swiss descendants and nationals outside Europe are found in the United States, Brazil, and Canada.

In the wake of the October 7 attacks that sparked the Gaza war, Hamas and other Palestinian militant groups abducted 251 people from Israel to the Gaza Strip, including children, women, and elderly people. Almost half of the hostages were foreign nationals or had multiple citizenships, and some hostages were Negev Bedouins. The hostages were held in different locations in the Gaza Strip.

168 hostages were returned alive to Israel, with 105 released in the 2023 Gaza war ceasefire, five released by Hamas outside the framework of any ceasefire agreement, eight rescued by the Israel Defense Forces (IDF), 30 released during the January 2025 Gaza war ceasefire, and 20 released under the Gaza peace plan. The bodies of 84 hostages were repatriated to Israel, with three of the hostages killed by friendly fire after escaping captivity and being mistaken for enemy fighters by IDF troops, the bodies of 47 other hostages repatriated through military operations, eight returned in the January 2025 ceasefire deal, and 27 returned under the Gaza peace plan. According to Israel, 84 hostages were killed on 7 October 2023 or in Hamas captivity. The body of one hostage is still being held in the Gaza Strip, as of 3 December 2025.

Benoit B. Mandelbrot (20 November 1924 – 14 October 2010) was a Polish-born French-American mathematician and polymath with broad interests in the practical sciences, especially regarding what he labeled as "the art of roughness" of physical phenomena and "the uncontrolled element in life". He referred to himself as a "fractalist" and is recognized for his contribution to the field of fractal geometry, which included coining the word "fractal", as well as developing a theory of "roughness and self-similarity" in nature.

In 1936, at the age of 11, Mandelbrot and his family emigrated from Warsaw, Poland, to France. After World War II ended, Mandelbrot studied mathematics, graduating from universities in Paris and in the United States and receiving a master's degree in aeronautics from the California Institute of Technology. He spent most of his career in both the United States and France, having dual French and American citizenship. In 1958, he began a 35-year career at IBM, where he became an IBM Fellow, and periodically took leaves of absence to teach at Harvard University. At Harvard, following the publication of his study of U.S. commodity markets in relation to cotton futures, he taught economics and applied sciences.

Iranian-Americans, also known as Persian-Americans, are United States citizens or nationals who are of Iranian ancestry or who hold Iranian citizenship. According to the National Organization for Civil Registration, an organization of the Ministry of Interior of Iran, the United States has the greatest number of Iranians outside the country.

Most Iranian-Americans arrived in the United States after 1979 in the wake of the Iranian Revolution and the fall of the Iranian monarchy. Over 40% of them settled in California, specifically Los Angeles, where they formed distinct ethnic enclaves, such as the Angelino community of "Tehrangeles" in Westwood, Los Angeles.

Chinese people in Japan (Japanese: 中華系日本人, Hepburn: Chūka-kei Nihon-jin) include any Japanese individuals self-identifying as ethnic Chinese or Chinese permanent residents living in Japan. People aged 22 or older cannot possess dual-citizenship in Japan, so Chinese possessing Japanese citizenship typically no longer possess Chinese citizenship. The term "Chinese people" typically refers to the Han Chinese, the main ethnic group living in China (PRC) (including Hong Kong and Macau SARs), Taiwan (ROC) and Singapore. Officially, China (PRC) is home to 55 additional ethnic minorities, including people such as Tibetans, though these people might not self-identify as Chinese. Han Chinese people have had a long history in Japan as a minority.