Baal Teshuva
Being or becoming a Jewish penitent (or returnee or born again), is known as a Baal teshuva (Hebrew: בעל תשובה; for a woman: בעלת תשובה, baalat teshuva; plural: בעלי תשובה, baalei teshuva) the Hebrew term referring to a person who has repented. Baal teshuva literally means "master of repentance or return (to Judaism)". The term has historically referred to a Jew who had not kept Jewish practices, and completed a process of introspection and thus returned to Judaism and morality. In Israel, another term is used, hozer beteshuva (חוזר בתשובה), literally "returning in repentance". Also, Jews who adopt religion later in life are known "baalei teshuva" or "hozerim beteshuva".
Read more about this topic: Repentance In Judaism