According to the Wikipedia article entitled White people
The concept of a unified white race did not achieve universal acceptance in Europe when it first came into use in the 17th century, or in the centuries afterwards. The strongest proponents of racialism in 20th century Europe, Fascist Italy and Nazi Germany, regarded some European peoples such as Slavs as racially distinct from themselves. Prior to the modern age, no European peoples regarded themselves as "white," but rather defined their race, ancestry, or ethnicity in terms of their nationality (Greek, Roman, etc). Moreover, there is no accepted standard for determining the geographic barrier between white and non-white people. Contemporary anthropologists and other scientists, while recognizing the reality of biological variation between different human populations, regard the concept of a "white race" as socially constructed.
The term "white race" or "white people" entered the major European languages in the later 17th century, in the context of racialized slavery and unequal social status in the European colonies. Description of populations as "white" in reference to their skin color predates this notion and is occasionally found in Greco-Roman ethnography and other ancient or medieval sources; but these societies did not have any notion of a white, pan-European race. Scholarship on race distinguishes the modern concept from pre-modern descriptions, which focused on physical complexion rather than race.
The term "white race" or "white people" entered the major European languages in the later 17th century, originating with the racialization of slavery at the time, in the context of the Atlantic slave trade [citation] and the enslavement of indigenous peoples in the Spanish Empire.[citation]
The work of Theodore W. Allen in his two volume set The Invention of the White Race, Volume 1 Racial Oppression and Social Control and The Invention of the White Race, Volume 2 The Origin of Racial Oppression in Anglo-America and Jacqueline Battalora's Birth of a White Nation: The Invention of White People and Its Relevance Today pinpoints the first usage of "white", specifically "White-woman", to the British Colony of Maryland in 1681 within An Act concerning Negroes & Slaves (Proceedings and Acts of the General Assembly, October 1678-November 1683 (Volume 7, Page 203-205) Liber W. H.); see Was race really unimportant in the 1660's?.
@sempaiscuba pointed out that the term "white" was used before 1681 by George Best in The fyrst Booke of the first voyage of Martin Frobisher Esquier, Captayne Generall for the dis∣couerie of the passage to Cataya and the East India, by the Northweast, first attempted in Anno Dom. 1576. the .15. of May
For euē vnder ye Equinoctiall in Ame∣rica, & in ye East Indies, & in the Ilāds Moluccae, yt people are not blacke, but white, with lōg haire vncurled as we haue, so that if the Ethiopians blacknesse came by the heate of the Sun, why should not those Americans and Indians also bée as blacke as they, séeyng the Sunne is equally distant frō them both, they abiding in one paralel: for the concaue and cōuexs Superficies of ye Orbe of the Sun is concentrike, and
equidistant to ye earth, except any man should imagine som∣what of Aux Solis, & Oppositum, whiche indiff•r•ntly may be applied aswel to ye one place, as to the other.
It manifestly and plainely appeareth by holy Scripture, that after the generall Inun∣dation and ouerflowing of the Earth, there remayned no moe mē aliue, but Noe & his thrée sonnes, Sem, Cham, and Iaphet, who only were lefte to possesse & inhabit the whole face of the earth: therefore all the land that vntill this daye hath bin inhabited by sundry discents, must néedes come of the ofspring eyther of Sem, Cham, or Iaphet, as the onely sonnes of Noe, who all thrée being white, and their wiues also, by course of nature, should haue begotten and brought forth white children.
however, it is not clear if their usage of the term was consistent with the context of usage of the term in the 17th century; that is, the use of the term "race" and "racial slavery" as described at the Wikipedia article.
This inquiry has the historical purpose of clarifying precisely who can be attributed with using the term "white man", "white woman" and "white race" by means of primary resources instead of secondary source, to avoid speculation and confusion.
Who is the first individual or person who described themselves as "white", "white man", "white woman", or "white person" in literature or law in the 17th century?
Who is the first individual or person to use the term "white race" in literature or law in the 17th century?