Multiracial people in the context of "Half-caste"

Puerto Ricans (Spanish: Puertorriqueños, [pweɾtoriˈkeɲos]), commonly known as Boricuas, but also occasionally referred to as Borinqueños, Borincanos, or Puertorros, are an ethnic group based in the Caribbean archipelago and island of Puerto Rico, and a nation identified with the Commonwealth of Puerto Rico through ancestry, culture, or history. Puerto Ricans are predominately a tri-racial, Spanish-speaking, Christian society, descending in varying degrees from Indigenous Taíno natives, Spanish and other European colonists, and West and Central African slaves, freedmen, and free Blacks. As citizens of a U.S. territory, Puerto Ricans have automatic birthright American citizenship, and are considerably influenced by American culture. The population of Puerto Ricans is between 9 and 10 million worldwide, with the overwhelming majority residing in Puerto Rico and the mainland United States.

Panethnicity is a political neologism used to group various ethnic groups together based on their related cultural origins; geographic, linguistic, religious, or "racial" (i.e. phenotypic) similarities are often used alone or in combination to draw panethnic boundaries. The term panethnic was used extensively during mid-20th century anti-colonial/national liberation movements. In the United States, Yen Le Espiritu popularized the term and coined the nominal term panethnicity in reference to Asian Americans, a racial category composed of disparate peoples having in common only their origin in the continent of Asia.

It has since seen some use as a replacement of the term race; for example, the aforementioned Asian Americans can be described as "a panethnicity" of various unrelated peoples of Asia, which are nevertheless perceived as a distinguishable group within the larger multiracial North American society.

Casta (Spanish: [ˈkasta]) is a term which means "lineage" in Spanish and Portuguese and has historically been used as a racial and social identifier. In the context of the Spanish Empire in the Americas, the term also refers to a controversial 20th-century theoretical framework which postulated that colonial society operated under a hierarchical race-based "caste system". From the outset, colonial Spanish America resulted in widespread intermarriage: unions of Spaniards (españoles), indigenous people (indios), and Africans (negros).

Basic mixed-race categories that appeared in official colonial documentation were mestizo, generally offspring of a Spaniard and an Indigenous person; and mulatto, offspring of a Spaniard and an African. A plethora of terms were used for people with mixed Spanish, Indigenous, and African ancestry in 18th-century casta paintings, but they are not known to have been widely used officially or unofficially in the Spanish Empire.

In South America, Indigenous peoples comprise the Pre-Columbian peoples and their descendants, as contrasted with people of European ancestry and those of African descent. In Spanish, Indigenous peoples are referred to as pueblos indígenas (lit. 'Indigenous peoples'), or pueblos nativos (lit. 'native peoples'). The term aborigen (lit. 'aborigine') is used in Argentina, and pueblos aborígenes (lit. 'aboriginal peoples') is commonly used in Colombia. The English term Amerindian (short for "Indians of the Americas") is often used in the Guianas. Latin Americans of mixed European and Indigenous descent are usually referred to as mestizos (Spanish) and mestiços (Portuguese), while those of mixed African and Indigenous ancestry are referred to as zambos.

It is believed that the first human populations of South America either arrived from Asia into North America via the Bering Land Bridge and migrated southwards or alternatively from Polynesia across the Pacific. The earliest generally accepted archaeological evidence for human habitation in South America dates to 14,000 years ago, and is located at the Monte Verde site in southern Chile. The descendants of these first inhabitants would become the Indigenous populations of South America.

The term "person of color" (pl.: people of color or persons of color; abbreviated POC) is used to describe any person who is not considered "white". In its current meaning, the term originated in, and is associated with, the United States. From the 2010s, however, it has been adopted elsewhere in the Anglosphere (often as person of colour), including relatively limited usage in the United Kingdom, Canada, Australia, Ireland, and South Africa.

In the United States, the term is involved in the various definitions of non-whiteness, including African Americans, Asian Americans, Native Americans, Pacific Islander Americans, multiracial Americans, and some Latino Americans, though members of these communities may prefer to view themselves through their cultural identities rather than color-related terminology. The term, as used in the United States, emphasizes common experiences of systemic racism, which some communities have faced. The term may also be used with other collective categories of people such as "communities of color", "men of color" (MOC), "women of color" (WOC), or "librarians of color". The acronym "BIPOC" refers to "black, indigenous, and other people of color" and aims to emphasize the historic oppression of black and indigenous people. The term "colored" was originally equivalent in use to the term "person of color" in American English, but usage of the appellation "colored" in the Southern United States gradually came to be restricted to "Negroes", and it is now considered a racial pejorative. Elsewhere in the world, and in other dialects of English, the term may have entirely different connotations, however; for example, in South Africa, "Coloureds" refers to multiple multiracial ethnic groups and is sometimes applied to other groups in Southern Africa, such as the Basters of Namibia.