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If the mother has passed, then since the child is a minor, she wouldn't have any legal power to determine where she lived. A minor is under the control and supervision of their parents until they either become an adult at the age of 18 or are emancipated earlier by the court.
The father would have sole discretion as the remaining parent to determine where she lived unless the grandparents petitioned for custody of the child and it was granted by the courts.