Olga's sisters were Grand Duchesses Tatiana, Maria, and Anastasia. She also had a brother, Tsarevich Alexei of Russia. Olga’s title ("Velikaya Knyazhna" Великая Княжна) is best translated as "Grand Princess". This meant that Olga, as an "Imperial Highness", was higher in rank than other Princesses in Europe who were "Royal Highnesses". "Grand Duchess" became the most well-known translation of the title into English from Russian. Olga's friends and family usually called her simply Olga Nikolaevna. They also called her "Olishka" or "Olya". Queen Victoria was her great-grandmother. Olga was very close to her sister Tatiana. They shared a room, dressed similarly, and were known as "The Big Pair". The younger sisters, Maria and Anastasia, were known as "The Little Pair".