Christina

fem. proper name, the native form of Latin Christiana, fem. of Christianus (see Christian). In the Middle Ages, the masculine form of the name (Cristian) was less popular in England than the feminine, though Christian was common in Brittany. Surnames Christie, Chrystal, etc. represent common Northern and Scottish pet forms of the names.

pet or familiar form of masc. proper name Christopher or fem. proper name Christine, Christina, etc.