Those aren't family names but rather patronyms or matronyms (respectively); they directly translate to "son/daughter of Ivan". As I understand though, matronyms are often based on the name of the person's mother, so Ivanova wouldn't be a common name.
That said, I don't speak Russian and have only a passing familiarity with the construction of Russian names, so don't take this as gospel.
Those aren't family names but rather patronyms or matronyms (respectively); they directly translate to "son/daughter of Ivan". As I understand though, matronyms are often based on the name of the person's mother, so Ivanova wouldn't be a common name.
That said, I don't speak Russian and have only a passing familiarity with the construction of Russian names, so don't take this as gospel.