 FACT: When Yevgraf gives Tonya the book with poems, it has its  author listed by initials only. He says that hes not the author and  that Y. A. Zhivago stands for Yuri Andreevich Zhivago. But the book  is clearly written in Cyrillic, and so Yevgrafs name starts with a  letter "Ye", while Yuris name starts with a letter "Yu", which are  two different letters. Tonya couldnt possibly mistake Yevgraf for  the poems author.