pros·e·lyte 
(prŏsə-līt′)
(prŏsə-līt′)n.
A new convert to a doctrine or religion.
v. pros·e·lyt·ed, pros·e·lyt·ing, pros·e·lytes
v.tr.
To proselytize (a person).
v.intr.
To engage in proselytization.
[Middle English proselite, from Old French, from Late Latin prosēlytus, from Greek prosēlutos, stranger, proselyte : pros-, pros- + , ēluth- aorist tense stem of erkhesthai, to go.]
prose·lyt′er n.