Justin is an anglicized form of the Latin given name Justinus, a derivative of Justus, meaning "just", "fair", or "righteous". Justinus was the name borne by various early saints, notably a 2nd-century Christian apologist and a boy martyr of the 3rd century (possibly spurious).
English Meaning: The name Justine is an English baby name. In English the meaning of the name Justine is: Just; upright. Feminine of Justin.