Unknown to someone - Idioms by The Free Dictionary
unknown to (one) (redirected from unknown to someone)
unknown to (one)
With someone being unaware (of something). Unknown to Jacobson, the other two partners had drawn up the deal in such a way that they would have full control of the company in two years' time. My wife invited her entire family to come stay with us for Christmas—unknown to me.
unknown to somebody without the person mentioned being aware of it: Unknown to me, he had already signed the agreement.
References in periodicals archive
At the time, I had just moved cross-country, and for the first time in a long time, I was living at an address that was unknown to someone
who was a threat to me.