The term Hispanic (Spanish: hispano or hispánico) refers to the people that originate from, or reside on, a former Spanish Empire viceroyalty. (Note: Spanish language is official nationwide, and thus spoken by 100% of the population, while the rest are co-official in their respective communities. The percentages shown mark the number of speakers that use each language as primary language at home.)(Note: The U.S. is a predominantly English-speaking country. As is true of many immigrant families, the immigrants often speak Spanish and some English, while their children are fluent English speakers because they were born and educated in the U.S. Some retain their Spanish language as is true of other immigrant families. The recent influx of large numbers of immigrants from Spanish-speaking countries into the U.S. has meant that the number of Spanish-speaking U.S. residents has increased, but the children speaking English as is true of the historic U.S. immigrant experience, continues. Migration from Hispanic countries has increased the Spanish-speaking population in the United States. Of those who speak Spanish in the United States, three quarters speak English well or very well.)(Note: a separate listing for Hispanics is not included because the U.S. Census Bureau considers Hispanic to mean a person of Hispanic American descent (including persons of Cuban, Mexican, or Puerto Rican origin) and of Spanish descent living in the U.S. who may be of any race or ethnic group (white, black, Asian, etc.); about 15–16% of the total U.S. population is Hispanic, not including estimates about alien residents). The term Hispanic (Spanish: hispano or hispánico) refers to the people that originate from, or reside on, a former Spanish Empire viceroyalty. It commonly applies to countries once under colonial possession by the Spanish Empire following Spanish colonization of the Americas, parts of the Asia-Pacific region and Africa. Principally, what are today the countries of Hispanic America, the Spanish Philippines, Spanish Guinea and Spanish Sahara where Spanish may or may not be the predominant or official language and their cultures are heavily derived from Spain although with strong local indigenous or other foreign influences. It could be argued that the term Hispanic should apply to all Spanish-speaking cultures or countries, as the historical roots of the word specifically pertain to the Iberian region. It is difficult to label a nation or culture with one term, such as Hispanic, as the ethnicities, customs, traditions, and art forms (music, literature, dress, culture, cuisine, and others) vary greatly by country and region. The Spanish language and Spanish culture are the main distinctions. The term Hispanic derives from Latin Hispanicus ('Spanish'), the adjectival derivation of Latin (and Greek) Hispania ('Spain') and Hispanus/Hispanos ('Spaniard'), ultimately probably of Celtiberian origin. In English the word is attested from the 16th century (and in the late 19th century in American English). The words Spain, Spanish, and Spaniard are of the same etymology as Hispanus, ultimately. Hispanus was the Latin name given to a person from Hispania during Roman rule. The ancient Roman Hispania, which roughly comprised what is currently called the Iberian Peninsula, included the contemporary states of Spain, Portugal, and Andorra, and the British Overseas Territory of Gibraltar. In English, the term Hispano-Roman is sometimes used. The Hispano-Romans were composed of people from many different indigenous tribes, in addition to Italian colonists. Some famous Hispani (plural of Hispanus) and Hispaniensis were the emperors Trajan, Marcus Aurelius, Hadrian, Theodosius I and Magnus Maximus, the poets Marcus Annaeus Lucanus, Martial and Prudentius, the philosophers Seneca the Elder and Seneca the Younger, or the usurper Maximus of Hispania. A number of these men, such as Trajan, Hadrian and others, were in fact descended from Roman colonial families. Here follows a comparison of several terms related to Hispanic: Hispania was divided into two provinces: Hispania Citerior and Hispania Ulterior. In 27 B.C, Hispania Ulterior was divided into two new provinces, Hispania Baetica and Hispania Lusitania, while Hispania Citerior was renamed Hispania Tarraconensis. This division of Hispania explains the usage of the singular and plural forms (Spain, and The Spains) used to refer to the peninsula and its kingdoms in the Middle Ages. Before the marriage of Queen Isabella I of Castile and King Ferdinand II of Aragon in 1469, the four Christian kingdoms of the Iberian Peninsula—the Kingdom of Portugal, the Crown of Aragon, the Crown of Castile, and the Kingdom of Navarre—were collectively called The Spains. This revival of the old Roman concept in the Middle Ages appears to have originated in Provençal, and was first documented at the end of the 11th century. In the Council of Constance, the four kingdoms shared one vote.