Verity

Verity ("alias" Veretie, Verety, Verita, Veritie, etc.) is a female first name and a surname. As a first name it derives from the Latin feminine noun "veritas", meaning "truth". It is thus an equivalent of Alethea, a female first name first used in England "circa" 1585, derived from the ancient and modern Greek feminine noun "αλήθεια" (pronounced "al-ee-thia"), meaning "truth". It was adopted in England as a Puritan and Quaker virtue name, truthfulness being considered as a desirable attribute especially in a female, and following a new Protestant tradition of naming children after virtues instead of saints in order to avoid idolatry. 
Verity is also a surname, which may have more ancient unrelated origins, possibly being a corruption of a similar word.