The name Olga is a girl's name of Russian origin meaning "holy". Olga and is often added to lists like Saints' Names for Girls and discussed in our forums with posts like "Change two letters (5 names)".
From the experts:
This Russian classic still has something of an exotic feel. Olga was one of Chekhov's Three Sisters, the name of the saint who was instrumental in spreading Christianity in Russia and the name of one of the USSR's most famous and popular gymnasts, Olga Korbut.