I don't know if it means much, but the name Olga has showed up a bit in sample dialogues and such a bit over my years of studying Spanish. Come to think of it, I think I've heard of a few Spanish-speaking Olgas.
The name Olga was used generously in Royal families throughout the 19th and 20th century in Europe, including the Russian, Greek, and Danish royal families.
Olga is also used in Italy, especially in the first years of the 20th century. It was the 11th most popular name in Rome in 1901. Today it sounds unfashionable.