Anton Yelchin's birth name was Анто́н Ви́кторович Ельчи́н. Using
the English alphabet, the Americanized version of that name is
Anton Viktorovich Yelchin.
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No, Anton Yelchin does not have any siblings. He is the only
child born to Irina and Viktor Yelchin. He was born in March of
1989.