Simplify the following text for a Grade 7 native English-speaking person.
Original: Olga 's friends and family generally called her simply Olga Nikolaevna or nicknamed her `` Olishka '' or `` Olya '' .
Simplified: Olga 's friends and family usually called her simply Olga Nikolaevna . They also called her `` Olishka '' or `` Olya '' .